I see a lot of archers at the local shop shooting these little bitty short vanes lately. I think one of the brands is called Duravanes or something like that. Anyway, from what I gathered, the advantage to them is increased speed of the arrow. But then one guy said, "But you wouldn't want to use these for hunting. You need 4 inch vanes for that" My question is, is that statement true and why? Thanks for the help.