Honestly it just takes longer. You can't say there's division when it's only a 50 year study. Think about it. The people in the States have people that went to school longer, and have more generations in school, so nature, is not over Nurture! The studies are old, and black were slaves, and not aloud books. When whites were. This is from old books. Its mostly nurture, and culture. Think about growing up speaking a different language then writing will be harder. I used to think that breakfast was said Breekfast, so writing it was hard! I couldn't imagine speaking in a bunch of slag helping me in English class. He's very smart, just a tiny bit off.