Sure, we all see overweight people in a crowd. But we also see very thin people in a crowd, and lots of people in between. Some might even conclude that we're far to obsessed with thinness these days, especially watching "stars" like Calista Flockhart, numerous models, and checking out the ranks of those in treatment for bulemia and other eating disorders.
It's ironic that our ideal has gotten thinner while Americans have gotten fatter. It's unquestionable, though, that as a group we're much fatter than we were even 30 years ago. Among children the difference is rather startling.