Just one of those historical/cultural oddities among many others----there have been girls gaming since the very start and there continues to be more and more by quite a number as the years go on same as with guys: People on the Whole are more down with it than ever before.
Like other things, Roguelikes are along for the ride and will get lifted up proper as it goes. I would say the main factor isn't necessarily gender based as far as norms and such go....well....outside of stuff like Noxico maybe....but mainly it just comes down to Polish Polish Polish----on all fronts, with much attention paid.
This is why Dredmor has many folks, same as, traditionally at least, jRPGs, and so on----no matter the gamer, polish gets noted and appreciated, and serves to perhaps ultimately have the power to tempt even detractors to test the waters.