shouldnt really call that a hair or your going to confuse ppl..only a female pistil will produce a "hair" and a male pollen sack has little leaf type things surrounding it that i dont know the exact name of and dont really look like hairs...also the pistil IS the preflower if its female, a preflower doesnt grow a pistil..preflower is just a term for an action not an actual piece of anatomy, so its a pistil whether its in a bud or down at the node as an early indicator of sex...i know what you mean if a preflower is that big and you dont have white hairs yet its probably male, just elaborating tho...