Oh I've gotten herms in reg beans for sure. Most surprisingly was goji og by bodhi. Not full herms but ball droppers.
Though I've had more balls dropped percentage wise with fems I would bet.
I started growing back in 2002 when I took the gamble of ordering skunk #1 feminized beans from Dutch passion via kind seeds in canada. Those fem skunks were so uniform and vigorous that I was sold on fem beans from the get go. Since then I honestly can't say one way or the other how regs or fems are better besides for breeding purposes.
To me it is just a matter of preference until the day more definitive scientific evidence proves that one results in better outcomes/product.