To be perfectly fair, magical girls have a heavy peripheral demographics of 19-30 males, and some magical girls anime were specifically aimed at that demographics (I only know of Nanoha, actually, but maybe there were others).
I'd say the issue with gendered readership and depiction of female characters in DC and Marvel may have more to do with the fact that comics regularly fail to treat their female characters as being as competent and/or interesting as their male counterpart, not to speak about page time, rather than ass shots. Where I live, fanservicey romantic shonen mangas such as Love Hina are often considered to be aimed at girls. I'm not sure how it evolved since then, but a few years back girls were the biggest readership of Love Hina.