I'm not sure I would agree with the comment of it not being good for diabetics. My son is a type I diabetic and its stongly recommended to eat protein along with your carb because it slows the absorption of the carb and won't cause such a huge spike in blood sugar.

For type II's it may not be quite as good, but anytime you can limit your carbs to 30gm in one meal, it would be an improvement over what most people eat.