Great article- I just want to add that the South Beach diet is also a no sugar diet. The diet was created by a Miami cardiologist, which allows no sugar at all during its strictest Stage One phase.
The first phase of the diet lasts about two weeks and the book suggests that the average weight loss from those two weeks is about ten pounds. Only lean meat, cheese, nuts and vegetables are allowed. Fruit is prohibited in the first phase.
The second phase allows minimal fruit and an introduction to some healthy carbs, but generally the South Beach Diet is considered a no sugar diet. With this diet too, cravings are eliminated within the first few days and an increase in energy is also reported.