I've noticed that very same thing! The better majority of Mustang drivers I see are women! about 65% of them, I'd say. I think another reason besides cost (which probably isn't biased towards any gender) is that the Mustang is also...'cute'.
I said it. I think the V6's appeal more to the average female crowd. Not our upstanding female members here, who've
clearly seen the light.
They're very weak (relatively - the V6's), and like I said, they're 'cute'. The Camaro is definitely NOT cute. it's attractive, yes. It's menacing, yes. it's powerful-looking, yes.
Will the afore mentioned females buy the V6 versions of Camaro? Undoubtedly, yes. No matter how you cut it, we WANT them to buy the V6's. It's the liferaft that the Camaro would need if all that sold were hi-po V6's and V8's. But it won't become a chick car...which is good.