Actually it works the opposite to how FW's post describes it. The ones killed off by lead based paint, go-cart crashes etc. are not around any more. Thus the overall life expectancy was reduced. Not to 35 though. But you old people () are the exceptions to the rule. Just like if you look at centenarians, they survived more or less randomly, not because of anything they did or didn't do.
The official debunking of FW's post can be found on snopes.com as usual.