Earlier quoted context omitted.
Not really - blacks from Africa and the Carribean do very well academically. It is only the American blacks that do poorly. They have the same biology and often a better starting line than the immigrants. Why is that?
It's a selection effect. Only a select population comes to America for college. Tellingly, the average population there doesn't do very well at all at home. And over here, they only do well comparatively. Compare them to say, Eastern Europeans, and it's a different story. Not many Nobel prizes per capita, I'm afraid.
The problem isn't "why are blacks and whites different" but "why do blacks and whites who have similar outcomes still produce children who have different outcomes?" Three possibilities:
1. The premise is flawed; just being in Shaker Heights doesn't suggest significant uniformity.
2. Regression to the mean.
3. Culture, etc. But that begs the question of difference once again, but re: culture rather than achievements. Unless it's all hollywood's fault.