JUST bag-seed? Shame on you! Bag seed is the shit. And 2 females out of 25, sounds like you got my luck.
Anyway, They can go a few more weeks. My method: Put your fingers over the top and flip the cup upside down. Gently slide the cup up and off. If the dirt falls to the floor, not time yet. If the dirt is held together by the roots, and there is a good root ball in the very bottom of the cup... its time.
It will be very benificial later down the road if you wait until you have that solid root ball.... NOT completely root-bound, just a nice ball. If you only see 2 or 3 roots, wait.
Reason: Roots will grow out till they hit the container, then start filling in. If you gradually step up the size of the container, you force the plant to use the space available. This makes a better, healthier root system. Better roots=Better
Buds
I go from a solo cup, to a 1 gallon, to a 3 gallon. Each transplant takes place about every 4 weeks. Hope this helps. And dont say JUST bag seed! I haven't bought a seed in my life, and never will.