I'd say "it depends", though that's not very helpful!

When I started out in SF/Fandtasy fandom back in the 1980's every aspect of fandom I encountered (except for Elfquest) was very heavily male-dominated. Online media fandom and popular film adaptations have helped redress the balance with fandoms like SPN and Twilight being very heavily female weighted, but when I go to Classic Who events it might as well be the 1980s because I can count the number of other females on one hand!