"Sheldon's reply: To point out one difference: Schwarzbein, an endocrinologist, stresses the need to balance our diet using all three food groups (fats, proteins, carbs) in order to balance our hormones. This is appears to be at odds with the evolutionary perspective of the Eadeses (PPLP), who believe no carbs are necessary."

The Schwarzbein Principle II makes a good point at balancing Protien, Carbs & Fat to control Adrenaline, Insulin & Cortisol.
Other books back up her claims. One that I own is The Cortisol Connection by Shawn Talbott, Ph.D. Even the Zone Diet speaks of balancing hormones. Which makes for a very complicated issue regarding the right diet, since no two persons have the same hormonal responses. Let me throw in another monkey wrench to this mix (Seratonin Levels)!!!

If you can control your seratonin levels you can supress hunger and carb cravings...