@Andrey Thanks for your comment.  I do think that you're probably in part right about my "sample" it may not be the most representative but I do think on a whole women are thinner here in Sofia than in any of the different cities I've living in the States.  I also think that @Andreytcho makes an excellent point when he notes that: not everyone lives on credit, they spend what they have and that avoids the overeating, over indulging.  Clearly the issue is bigger than just going to Bulgarian folk dance a couple of times a week or everyone would be doing it.