In a long term serious breeding project, feminizing seed is a dangerous shortcut which is likely to favour plants which are more likely to produce male flowers on a female plant, IRREGARDLESS of the method. Its irresponsible for any breeder to not select against the tendancy of female plants to produce male flowers IRREGARDLESS of the cause.
For seed by selfing through silver or GA or equivalent methods its fine for first generation crops, or the maintenance of an Open Pollinated variety as production stock. Beyond a single generation it really begs the question as why one would not select a preferred male to breed the female, rather than selfing a female. Especially since a self female in populations available today will NOT breed true as they are not homozygous (not fully inbred).
Anybody who thinks otherwise about the simplicity of the inheritance of the production of male flowers on a female plant or the lack of understanding male\female heterozygous condition in Cannabis is fooling themselves.
Fire Away zealots, I'm ducking