 Rec0Man, Your estimates of subgroup IQ from the diasporas assumes that the diaspora is unselected, right? I find it hard to believe that the Brahmins in Silicon Valley are a respresentative sample of Brahmins from their region. Doesn't it seem more reasonable that they are an elite within the elite? I wish I could offer some correction for that. Possibly compare the entrance exam scores of Indians who emigrated to the US with those who did not. 