Hi, I don't know if this is the appropriate venue for that, but I'm intrigued about these results of a Spaniard man (so, they're not mine, I was asked by him exactly about these apparently unusual percentages).
He says he was surprised by his results mainly because, being a Spaniard from a region closer to the Basque Country than to Portugal (yet he clusters closer to Portuguese people) he appears in the Gedmatch calculator for ancient admixtures with a relatively low "Neolithic" (42%) and a really excessive WHG (25.8%), as well as a significant proportion of EHG (18.1%). But I found it a bit weird that "Neolithic", which includes a big chunk of Basal Eurasian, is lumped together with a muuuuuch later admixture than Basal Eurasian. Doesn't that kind of thing cause some distortions due to some overlap?
Also, I notice that there is no admixture that, at least as far as I can see, is a good proxy for CHG or Iranian_Neolithic (though Basal Eurasian was also quite prevalent in the latter). Could it be that his relatively huge % of WHG and EHG are simply an artifact of the lack of a set of admixtures that would be a better fit to his real Neolithic/Mesolithic ancestral admixtures?
I don't know, I just find it a bit implausible that this Modern Spaniard, who clusters on the PCA as very close to other Spaniards and especially to Portuguese people, would have just 42% of "EEF proper" ancestry and almost 26% of "real" WHG. Also, this 18.1% EHG would mean something like 35% of Bronze Age steppe admixture.
Wouldn't he plot in a quite different position from that of average Iberians if those were his ACTUAL genetic makeup?