Well you don't need to be a genius to pretty much get at the conclusion of a bigger ceiling in speed sports for black people.
And yes, I don't remember the last time I saw a black O-lifter, for example. And so on. But more on the speed side of things - 100m, 200m, 400m, whatever, blacks rule. Both men and women.
Like Kelly said - if a guy put a gun at your head and told you to choose a kid that you'd believe is the most athletic (fast or whatever, you have to define what "athletic" means first but whatever) out of 100 kids, chances are you're going to pick a black kid.