I don't know if it's a class thing so much as an aspiration thing. In my diverse community, which could be broadly characterized as "middle -class/upper middle class black, lower-middle class/middle class white," it was the people who put on airs who had the biggest problems with me getting higher marks than them. There was also a transition; when I was younger, I got the most guff from the ghetto-fabulous black kids and got along relatively well with the white kids. Starting in middle school and intensifying in high school, the black kids seemed to chill and the hostility and ostracization from the white kids grew. I attribute this to the changing social dynamics: while the black kids who weren't getting the best-of-the-best scores had already been tracked into standard classes and could read the writing on the wall in terms of how academia was going to treat them going forward, the mediocre, insecure, and would-be upwardly-mobile white kids were becoming aware of the precariousness of their situation. They'd been boosted beyond their natural ability by savvy parents and a system set up to do so. An aloof black kid waltzing into class and getting by with little effort was threatening. God forbid he learn to study.