In trying to do the diet on my own, I have come to know, in a deeply personal way, that carbohydrates are addictive. Its the classic sugar rush. If I have a significant number of carbs, then about 2 to 2.5 hours later I have a sugar crash and I either need more carbs or I feel like I can not stay awake.
If I have a large bagel for breakfast, then I'm going to end up eating way too much all day long. So while I'm not sure you have to be as drastic as the Atkins diet, I can see why the low carb diets seem to have a higher success rate. My plan is to try not to eat much carbs in the early part of the day. Ironically I seem to do better when I have oatmeal for breakfast.