Funny, I think the longer the flower, the higher the chance, but you may be correct on that. I assumed it was some "survival of the species" reaction where, if the female doesn't get pollinated late into flower
Yes, I have observed the same thing. PitA when you have a plant that takes 16 (or more ) weeks to flower.
I once had a mother plant that was, IDK, six or eight years old. I never saw male flowers in the vegetative phase. It produced a few (+/-) female ones, but I just more or less ignored those.