What about the billions of relatively poor people in Asia who eat mostly rice? Why are they not getting fat? Why are they not getting diabetes and heart disease? The answer is because they are poor. Poor people eat less, and they move more. The answer is because they are skinny. I can put someone on a diet that consists of 75% Twinkies, and as long as I keep their total calories low enough to keep them skinny, they are going to have an awesome lipid profile, low triglycerides, and a rocking fasting glucose. The problem is not the fat in our Western diets, and the problem is not the carbs in our Western diets. The problem is our wealth. The problem is that we are fat, sedentary, and we are surrounded by an over-abundance of food. This is where your study comes in. It basically says that if you are struggling with portion control, and you want to maximize the amount of calories that you can shove into your pie-hole and still maintain the same level of fatness, you should probably go with a low-carb, high-fat diet. This is an interesting observation. But it seems to me that their might be better strategies.