Used bag seed for 10-15+ yrs (mostly Mexi-brick...easily accessible back in the 1970's-'80's)....or from friends in Indiana...bag seed there.
NEVER got herms. It's when strains of one kind have unstable genetics you start seeing webbed/curling leaves, funky grow patterns and" he/shes".
in mexico the seeds are from males, not herms. locally sourced stuff is usually from herms ...IMHO I have grown out shitloads of both...theres diff stages of herms too.. sometimes a few balls on lower branches and thats it,sometimes random bannanas , and full on herm balls galore lol