[Mamzelle]

re: cleft chins, does that imply that the feature is linked to some genetic advantage that we're not aware of?)))

Could well be. We could also check to see how large their hands are...

[stands2reason]

If you guys are talking about THAT genetic advantage, I'll give you a hint.

Big head, wide nose, rich timbre of voice (baritone or lower) are the cues.

I'm not sure on the big hands, but height had nothing to do with it.