Well, in fact I've heard a lot about fat people in USA. I even saw document about that. I think it's very popular to go to fast food and people aren't very active there.
About ketchup - I never wondered about that but - yes. You are right I remember when my brother was younger, he always used tu add lots of ketchup to everything...
In my area there, very close to each other are KFC, Pizza Hut &Mc Donald..but what happened in shopping centers - there you have food nerly everywhere