Just from my own body comp changes, I'm inclined to agree. If half my protein turned to sugar, I'd be having some real trouble - which I'm not. If I overeat, it just turns into muscle, not fat, and I get no sugar buzz or crash. But that's just my own subjective experience, no science here.
Steak, eggs, potatoes - fruits, nuts, berries and forage. Coconut milk and potent herbs and spices. Tea instead of coffee now and teeny amounts of kelp daily. Let's see how this does! Not really had dairy much, and gut seems better for it.