I don't have that much time to look at the link, but at the first glance it appears that at least some of the studies reviewed relied on self-reported calorie i

I don't have that much time to look at the link, but at the first glance it appears that at least some of the studies reviewed relied on self-reported calorie intake, so the subjects were not kept in laboratory conditions where the food intake was strictly measured. This has been shown to be widely inaccurate, for example here and in the references to this study http://ajcn.nutrition.org/content/71/1/130.long http://ajcn.nutrition.org/content/71/1/130.long