There are hordes of screaming girls at Beatles concerts captured on film. From the very start, there were "teeny-bopper magazines, which were aimed largely at pre-teen and teen girls". Watch any club owner in an interview and they'll say "it's all about getting da birds on the dancefloor." And so many male rockstars say that got into it to meet girls, I'm surprised if they say something different. Everyone knows the role young women play in popularizing stuff, as a demographic.
(The only place may not be true is nerd culture comics, the last hold-out of knuckleheadism... and who cares. The fight is being fought.)
Early Rock was chauvinistic, Punk challenged it, and pop music's been back/forth since then. It's been discussed to the ground. It's sort of boring to hear about at this point. A lot of female artists fought for recognition, and they got it. Women in pop music are culturally relevant, if they weren't two generations ago.
This is all a far cry from some unprovable statement that the majority of Potter fans were young women. And in considering Beatlemania, I just had a thought. Are "Teen girls are often ridiculed for their preferences"? Seems like just the opposite.