That's not what your previous post was talking about. But if you insist, at least make your point clear. "African Americans" and "Africans" are wildly different genetic populations that get subsumed under the same "Black" racial category in the US. Which one were you talking about?

The latter is more genetically diverse than any other human population by an incredible margin. Making generalized statements about them is impossible (including this one). As for African American populations, ancestry estimates of how closely related they are to African populations vary massively for each individual. Many people are much closer to "white" populations than any African population, due to the history of African Americans in North America. If you really mean race as a geographic proxy, the "black" label is simply confusing what you actually mean.

But then what are you arguing? Geographic location determines IQ? (An inherently flawed measurement itself)