http://health.usnews.com/best-diet/best-overall-diets
US News did a piece on the 25 best diets; what's more interesting for me is below each diet is a reader poll asking if those diets worked for them.
The only ones that seemed to work for the majority of readers: Weight watchers, vegetarianism, veganism, Eco-atkins, and medifast! Most of the others have more failures (according to this poll) than successes! I don't know what the face value of this article is, but it's quiet interesting.

