So I have no idea what his qualifications are, but every time I chase down something he quotes I find it in a proven reliable source.. I added the pie chart. The E3b would mostly be E3b1a, specific to the Balkan area, and E3b3, origin unknown.
The most comprehensive study of Y-chromosomal diversity in Europe thus far is Rosser et al., . The human Y chromosome is passed on from father to son. One can thus study one half of a population’s ancestry (along the paternal line) by studying the Y-chromosome. Greek Y-chromosomes belong to haplogroups HG1, HG2, HG3, HG9, HG21 and HG26. None of the 35 Greek Y chromosomes are of non-Caucasoid origin.
by Dienekes Pontikos
Last Update: 1 May, 2008
A second Y-chromosome study including Greeks have also shown similar results. Helgason et al.,  reports one HG16 sequence of North Eurasian provenance in a sample of 42 Greeks (at least 97.6% Caucasoid). To put this in perspective, eight HG16 chromosomes occur in 110 Swedes (at least 92.7% Caucasoid) and three HG16 sequences in 112 Norwegians (at least 97.3% Caucasoid) were also found. HG16 is shared by many populations ranging from Europe to Mongolia. Its origin has been placed by  in the Eastern range of its current geographical distribution.
A third Y-chromosome study, by Malaspina et al.,  which included a sample of 28 continental and 83 Cretan Greeks (total sample size of 111) found no evidence of the presence of non-Caucasoid Y chromosomes in Greeks.
A fourth Y-chromosome study, by Semino et al.,  included 76 Greeks and 20 Macedonian Greeks. One Eu6 lineage, corresponding to HG10/HG36  is probably of East Asian origin. One Eu17 lineage corresponds to HG 28 which is frequent in Central Asia and the Indian subcontinent . In total, admixture of 2.1% is detected (if we label HG 28 as non-Caucasoid).
A fifth Y-chromosome study, by Weale et al.,  included 132 Greek students from Athens. The same haplogroups found in  were detected in this study. No non-Caucasoid chromosomes were found.
The most recent and comprehensive study of Greek Y-chromosomes, by Di Giacomo et al.,  included 154 individuals from continental Greece and 212 from Crete, Lesvos and Chios. In total, Greeks from thirteen separate locations were examined, thus giving the most complete picture of variation so far. A single haplogroup A chromosome was found (in Lesvos) which is usually found in Africa. The remainder belonged to haplogroups found in Caucasoid populations. The breakup (in percent) of the haplogroups observed) based on the set of markers typed is as follows.
|P*(xR1a)||R1a||DE||G2||I-M170||J2(DYS413= 18)||J2*(xDYS413= 18)||J*(xJ2)||A||Y*(xA,DE,G2,I,J,P)|
A newer study by Semino et al.  has studied two samples of Greeks of size 84 and 59 (Macedonian Greeks). The focus was on two specific haplogroups E and J which are frequent in the Mediterranean region and can be used to detect population movements between Europe, Africa and the Near East. 2.4% of Greeks belong in haplogroup E-M123 and 21.4% in E-M78. Clades of E prevalent in Northern or Sub-Saharan Africa were not found. According to Cruciani et al.  most Greeks and other Balkan people belong to a specific cluster a within haplogroup E-M78 that is found in lower frequencies outside the Balkans and marks migrations from the Balkan area. E-M123 and its daughter haplogroup E-M34 originated in the Near East in prehistoric times. As for haplogroup J, most Greeks (22.8% Greeks/14.3% Macedonian Greeks) belong to J-M172 and its subclades which is associated with Neolithic population movements. Only 1.8%/2.2% of Macedonian Greeks/Greeks belonged to haplogroup J-M267 which could potentially (althought not certainly) reflect more recent Near Eastern admixture.
Bosch et al.  studied Y chromosome variation in the Balkans, including a sample of 41 Greeks. Greeks belonged to the major Caucasoid haplogroups. The identity of the K*(xP) chromosomes is not clear, but they could belong to the minor Caucasoid haplogroups K2 and L which have been previously observed in Greeks, or to other K-related lineages.
Firasat et al.  tested 77 Greeks as part of a study of the purported Greek origins of certain ethnic groups of Pakistan. The breakdown of the observed haplogroups is given in the table below. One haplogroup H2 was observed, which is more typical of South Asian populations.
Martinez et al.  has studied a sample of 168 Greek men from Lasithi and Heraklion in Crete. No Sub-Saharan African influence was detected, and 2 Q chromosomes, which could conceivably be indicative of Asian influence were detected. The exact origin of these is uncertain, since no downstream markers were typed. The Y chromosome haplogroups detected in this sample are listed below (click to magnify).
King et al.  sampled 193 Cretans and 171 mainland Greeks from Central Macedonia near Nea Nikomedeia, Thessaly within the southeast Larissa basin and near Sesklo/Dimini and Northwest Peloponnese near Franchthi Cave and Lerna. No non-Caucasoid haplogroups were found, and the results indicate a relationship between the Cretan samples with Anatolia and the mainland Greek ones with the Balkans, with the Peloponnesian sample showing a closer affinity to Crete. The authors interpret their findings as indicative of separate sources for the Neolithization of mainland Greece and Crete. Interestingly, the age of haplogroup E-V13, the Balkan clade of haplogroup E3b makes it a candidate for being present in the Mesolithic rather than being introduced in the Neolithic. E-M81, the North African clade of E3b is found at 1.8% in Nea Nikomedeia and in Sesklo/Dimini and not in Greece, confirming the limited influence of Africa to the Greek population; its absence from Crete is inconsistent with ideas of an African origin of the Minoan civilization.
Thus, at present, in a total of eight studies, in which 1,575 Greek males were tested, one HG16, one HG28, one HG10/HG36, one H2, one haplogroup A, and two haplogroup Q chromosomes have been found, for a total of 0.44% possible non-Caucasoid contribution to the modern Greek male gene pool. Additionally, the latest studies [9, 10] with a more refined version of the Y chromosome phylogeny indicate that influences from the Near East and North Africa in historical times are unlikely (perhaps in the order of ~2%). Additionally, Y chromosome haplogroup R1a which is very frequent in Slavic populations (>50%) is found in only around 9.8% of Greeks, and is also found at comparable frequencies further East (10.8% in Iraq; Al-Zahery et al. ) indicating that its presence in Greece need not be associated with medieval intrusions by Slavic speakers. The emerging picture of Y chromosome variation in Greece indicates genetic continuity, with slight influences from neighboring Caucasoid regions and virtually no influence from non-Caucasoids.
Flores et al.  have compiled haplogroup and sub-haplogroup data from three of the afore-mentioned studies which included Greek samples [4, 9, 10]. The total sample size of this meta-analysis is 442. An error has resulted in the false inclusion of 0.2% frequency of haplogroup B which was not reported in the original sources (A.M. González, personal communication). The table of haplogroup frequencies reported in  is given below:
Future studies with larger samples and more detailed founder analyses will allow us to obtain a better pictures of Y-chromosome variation in Greece, Europe and the world at large. At present, it appears that modern Europeans share many of the haplogroups, while there is also geographic structure in the distribution. With the exception of the Northeast corner of Europe, all other European populations have very small traces of extra-Caucasoid genetic input(a).