I literally cannot even tell that this perk makes a difference. I'm sure it does, and it's probably something pointless like 5 or 10% faster draw time. If you can't actually feel that it makes a difference, it doesn't matter because it's still entirely up to the player to decide when to loose the arrow. So if I try to fire early because I expect to have a faster draw time after a headshot, unless my timing is 100% inhumanly perfect, I either lose damage and accuracy by firing too early, or waste the effect by firing too late.