sounds like a winner..Keep an eye on them for a few more weeks...throw up some pics in the 6th week..chaps here will help ID them 4u...take care and be safe:bolt::bong:
You'll start seeing preflowers soon, usually after alternating nodes begin, but not neccesarily. If they throw out a pistil or two then you got a winner.
I generally find that they show sex soon after alternating nodes. However, some will show before they develop alternating nodes and (very rarely), plants do not get alternating nodes at all.