>In the last 11 Olympics, men with Sub-Saharan African ancestry have earned 87 of 88 finalist berths in the 100m dash. Is this random chance or does race correlate with some genetic traits enabling differentiation in physical abilities?

First, you're completely forgetting culture. Second, nobody is claiming that there is no genetic difference between humans, it's just that the races we define don't correlate very well with them. Sub-Saharan Africa has the most human genetic diversity, so why would they be all of the same race?