Well they push the supplements obviously to make money, but it didn't pertain anything to the article. It's not like the article was justifying the supplements.
The study states high protein and lowered carbs, youre right in that it doesnt specify high carbs. I believe what they meant is higher carbs as compared to high fat diets, not necessarily high carbs.
It's an interesting theory. Just this morning I posted another study on diet in the nutrition section. That study would be contradicting to a high protein higher carb approach. But I don't think it takes into consideration athletes vs obese. Or sedentary vs. Active. It does cite Chinese farmers who live on a high carb diet(white rice) but have lesser instances of obesity. And as the farmers became more urbanized, obesity and diabetes all rose.
I'll give it a try. I've always been under the assumption slow and steady was better to preserve muscle.