I've always read that the insulin response to fats + carbs is higher than carbs alone.
Eh, I don't think that is the case. Ice cream has a much lower glycemic index than bread for example.
Or just take r-lipoic acid after/with glucose heavy food consumption. It'll help prevent and or lessen the spike. Diabetics use it to control their glucose levels. It can significantly push that down. I'm not seriously suggesting this of course, however it does work.