This answer isn't going to be loved by Europeans. I'm British and live in the US. This is not based on assumption but on observation. It's all about class. read more
Well, the one thing that's fairly consistent across all of Europe and the US is that obesity correlates with lower socioeconomic status, so when slightly snobbish Europeans are forced to interact with Americans who seem low status to them, they tend to be fatter than they are. read more