i'm sure that somewhere, sometime, there has been a scientific study to prove that fact. As you all know we will never EVER hear about it though. My only experience with this dates all the way back to my freshmen year of highschool. I used to play baseball all my life, from the time I was 5 years old. There was a core group of kids, 6 of us who stayed together all the way to highschool. We would pick up players here and there, but the 6 of us stayed together everyyear. 3 of those kids were black. Myself and 2 of the black kids were basically the same size, I had a stronger arm then them, but they could natually run faster then I could. Before highschool, we never lifted any weights, we stayed in shape all year long. However when we got to highschool, our coach put us in "weight training, At the end of our freshmen year, I had put on some muscle and aldded a little weight. But the black kids, just exploded, they bulked up and got ripped almost instantly. I felt like I had to work twice and hard as they did in the weight room, and still didn't get the results they did. It just comes natural for them. But thats just my personal experience.