Sure, I'd agree that nurture has a much bigger impact than nature.
We're just throwing a lot of anecdata around here, unfortunately. It seems like people have quite a problem with, when they see an argument they disagree with, they say, "Not only are you wrong, there is no possible way that you could ever be correct"...and in this case, well, yeah...scientifically, it *is* possible that they're true to some extent. We just don't have any proof of it so we should assume there is no correlation.
Your opponent can be wrong without being an utter and total fuckwit.
(no offense, stoatwblr--you're one of the politer people I've talked to on /. lately)