He was showing nothing, from his personal observation he was saying these things, that is not concrete evidence. I could say from my experience that college sprinters are 90% white from my observation, that doesnt make it correct, and althought that is true for me, I know it is nowhere near correct.
And he is comparing two different populations which is not correct. He is using the general population to make distinictions from his personal observation and then applying them to a very small subset of the population which may or may not be correct but has very little to do with the total population.
And not all sprint related sports are dominated by africans, yes elite track is and american football thats about it. And I am done with this topic it will just go around in circles and get no where as usual. And you will reply back so you get the last word.