If you think about it, it's not really surprising. Harvard is not going to take a kid who reads at a 6th grade level, no matter what. They will take an underrep

If you think about it, it's not really surprising. Harvard is not going to take a kid who reads at a 6th grade level, no matter what. They will take an underrepresented minority kid who is probably just short of being an outright admit. And where are those types of kids most likely to come from? The higher income end of the minority group, of course.