2 weeks and still no preflowers...?

I started 12/12 2-weeks ago and have since been fortunate to have 4 females (2 bubblegum & 2 Indica Aurora thriving in the back yard) to 2 males (which I cut and tossed). I have 10 plants remaining; mainly Super Ice with a couple of the previously mentioned strains. My concern is that there are no preflowers of either sex appearing on the remaining plants and it has been quite some time since the other's made their sex apparent. Obviously the lighting works as the other plants showed their bias... and experience or notions with regard to this situation?

The longer the better. Males normally show signs of sex first. So your odds are good.

BBE

must be total darkness to get good bud formation

I'm fortunate that the room I'm using to sex these plants is totally dark! It only has 1 small window that has been totally sealed. Next time I go over, I'll see if I can get some pics of the plants to see if there is anything worth viewing...?