Probably... But really, before I lost a lot of weight, I used to be the fattest kid in class having a BMI of ~24. I know you count it different for kids but still, I just don't see a lot of fat people here in Poland. Most girls are naturally slim, some are curvy (and I don't mean hippo curvy) and a tiny percent is obese. In my high school with over 1000 students I only know of one really, really obese girl, there was also one in my middle school. And lately I visited England for a week, and walking through the streets etc. I didn't notice obese people either. Aren't they exaggerating a bit?