Exactly. I've been raiding since Kara and I've never even been treated badly just because I'm a girl. I keep quiet, for the most part, and don't talk in vent unless I have to. I've had my fair share of guys hitting on me, but, with (what seems) a 9:1 ratio it's to be expected. I've never been given anything just because I have boobs IRL. And I'm perfectly happy about that. I can stay competitive with the best players in my guild, and that's why I'm a successful raider for 5 years now. Not because I'm a girl.
I think kids have the same trouble. I met the greatest kid in Wrath, he was about 13 I think. Everyone gave him shit over his voice, but he was a damn good player and he never caused any drama or anything. He was an exception to the norm, sure, but that doesn't mean he should be outright denied any privileges.