Fem seed in my experience seems to lack that hybrid vigor from reg seed. But I have not come to a conclusion since I would love to grow more out to really get a better fell between the 2. So it is possible the ones seeing explosive growth have better genetics.
I think a great experiment for you to try to get conclusive results, is to use clones from the same mother plant. Then you will know for sure without any doubt.
Great idea! This way there can be no doubt.
The problem from an outdoor growers perspective however is that I won't know what sex they are for another month now and if I take cuttings at that time they will be hard pushed to make it to the end of the season with a decent crop. The test can still happen though for sure.
Thanks very much for your thoughts!