Notice that once again they don't quote any studies to back up their claims. Mostly it's opinion and opinion based on ignorance of what the plans are about and how they work at that.
The gut needs carbohydrate? Tell that to folks with a yeast overgrowth. Fiber...yup, we need that, but I got about 30 grams of fiber yesterday which is more than most high carbers get on a daily basis.
Protein Power raises cholesterol? Guess they missed the studies that showed cardiac profiles much improved on low carb vs. low fat.
Utter nonsense!