As I understand it (correct me if I am wrong) placing an opening in the hood that far back does not really bring much air in so the butterflys were basically a cosmetic feature. So, to answer your question in that context I thought they looked cool. By functional I meant they move as opposed to not moving but I see where you are coming from by defining functional as actually performing an action that contributes to performance.

If I could have both form and function that would be fun.