in china study page 74, chart 4.3, a standardized body-weight 65 kg (143 lbs) is used. it takes 2641 kcal/day for chinese person to weigh 65 kg while it takes 1989 kcal/day for united states person. it indicates that calorie counting is flawed. i won't say why, you just need to draw your own conclusion based on this link:
http://books.google.com/books?id=FIRLLcLjyC8C&pg=PA74...
i guess history repeats herself (google mcgovern), it's politically easier to blame everything on abstract thing (like fat, calorie, etc) than on specific thing (like milk, meat, etc)