No, but I'd bet you could put a thousand 2-year olds on a 2-wheel bike and only a couple of them would pull it off, regardless of the amount of "nurture" involved. I live in a unique place where there are multiple national and world champions in all kinds of sports, and I have seen their kids and know first hand that genetics can give an athlete a huge head start on the competition. You can practice and train all you want but there will always be a few guys that can pretty much just show up and kick your ass, and it has nothing to do with opportunities or nurturing.
I think some people have a lack of exposure to elite athletes. My brother lives in the same part of the state as you do; even though he is a pretty amazing athlete (for a normal person), he is continually amazed by what surrounds them.
Maybe people just need to think, "I could do that if I only tried hard enough." And to an extent that is true, depending on the level you are looking for. But one of the things I find interesting about the new book is the author's focus on training, and how everyone reacts differently (individually) to training. In a nutshell, Epstein discovered that his running partner started at a higher baseline, but Epstein himself responded better to the exact same training regimen. So his friend gets pegged as "high talent, but wastes it" whereas Epstein is "not as high talent, but great worker!!" But it's not that simple.