The study cited confirms what I think most of us knew all along: that we can't just eat like a thin person does and expect to get thin. Even after we get to the same weight they are, we still can't, or we will regain the weight.

Losing weight for those who are in this predicament (regardless of whether low carb, low calorie, or something else) needs to be a permanent commitment, and not a small one. This is hard for anyone to accept. But accept it we must or we are doomed to fail.