I think if you just look at weight, maybe there is something to this, but if you look at health it's a vastly different story. I have always been fat, but I have also always been healthy by all measurements and except for a few bad years in my 20's reasonably fit. My husband on the other hand is thin, always been thin but has tons of carb-poisoning related ailments he feels he may never reverse. Weight is never the whole picture. I am the same weight I was in high school. Would I like to be thin and healthy? Yes, but I'd rather be healthy. And I do think all of that can be reversed.