Maybe so, but Americans are also some of the tallest people (especially compared to those who eat much less). I'm not saying this is necessarily for the better or for the worse, but it's not easy to just say "you should eat this". Recommendations for diet change - remember when it was "don't eat fat", then "don't eat sugar", then "don't eat either"? Who knows.

After all the diet recommendations and panics about obesity, I still think most of us know what healthy eating is.