This article starts out with the proof before explaining the theory. It has before and after pictures showing that what you eat is much more important than the number of calories you eat. She proves this by eating a huge amount of food daily for 4 years and this caused her to lose 33 pounds.
Actually she eats more food (by weight) than any other woman on the planet. She has even eaten 40 pounds of food in one day! Then it explains how comical the understanding of experts are. See Be Slim by Eating Good Carbs Instead of Bad Carbs