I'm assuming even a remotely different hurtbox for a female character would raise a sihtstorm on the internet. GFAQs flooded with "You can shoot breasts through ceilings" or nonsensical topics getting fed hundreds of posts... .
This happened with Gears 3. The board was awash in claims that the hitboxes on the smaller female models were smaller, giving them an advantage. I have to assume that's nonsense, but... it's GFaqs.
Protip: If you don't see gorilla coming he's already behind you, lotion bottle in hand. --CaPwnd