The menus I've seen coming from them are low calorie, low fat, low protein, and high carbohydrate. THAT, my friend is what causes type 2 diabetes, as well as high cholesterol.
Actually, type 2 diabetes is caused by a genetic defect—one that is rampant on my father's side of my family. He had it, all his brothers had it, his father had it, and now, my brother and I have it.
If you don't have the genetic pattern, then you will never develop type 2 diabetes, no matter what you eat or how you otherwise care for yourself or fail to do so.