I, too am skeptical of the article. A sample size of 14 people is hardly representative, and even it it were, I really don't see the value in it in terms of weight loss and healthy eating over the long term. It seems to me that the researchers are trying to make a name for themselves by sensationalizing a marginal finding from a seriously flawed study.
Many of us here have lost and regained weight many times in our lifetimes. Some of us have used "fad" or extreme diets to get there, only to regain the weight once we return to normal eating. This is why cutting out entire groups of food is never a good idea.
The key here is lifestyle change, and that change must be one you can live with for the rest of your life. If you enjoy carrot cake, or any of the so called "bad" foods, then having a small portion on occasion will hardly be of detriment to either your health or your waistline. If you deny yourself that piece of carrot cake you will only feel deprived and more likely to slip in the future.
Anyway, that's just my two cents. I read this article and it kinda steamed me up, and I just had to say something!
~Silvervixen