There was an interesting story in the NY Times sunday about a study of a more nuanced approach. It was to determine the best diet for athletes but by my thinking it has much broader implications for all those trying to shed fat. If you work out in the morning and eat your carbs for breakfast and lunch and eat almost pure protein for supper you body will burn much more fat during your morning workout. If you don't have carbs available during the workout your body will burn your fat before the protein in the food from the night before.
There was dramatic change in athletic strength within 3 weeks (3%) because of the conversion of fat to muscle.
The Atkins diet is pretty terrible for the planet if it is adopted by a large percentage of humans, although that will likely never happen.
Carbos are the calories for a shrinking planet if not waistline. Actually, I believe it is the carbs that aren't bonded to cellulose that are fattening. White flour, corn syrup and so forth.