Yep although I will say that ~30% is a fairly large number, and I'm pretty pleased by it. It is a large enough percentage of players that game developers should take note of it and think more and more about the female gamer and what she wants.
I'd say that 30% is unusually high and not representative of the gender mix of the audiences of other big name game releases. I highly doubt 30% of the audiences of Call of Duty: Advanced Warfare, Assassin's Creed: Unity, Destiny, watch_dogs, Shadow of Mordor, or Dark Souls 2 is female. Bioware's focus on storytelling (and romance) rather than on 360 no scoping noobs or butchering orcs is probably why they have an unusual audience mix. Now that does not mean for a second that devs should not consider female gamers as a viable audience (they absolutely should), rather it indicates that there are types of games that can be made that will appeal to a female audience, but that those games are fairly different to those that will typically appeal to the young adult male audience and that there isn't much overlap between the two.
In short, it seems that in order to get women to play a game (in any significant numbers), you need to offer them an interesting story, as the mechanical aspects of gameplay alone are unlikely to draw them in and keep them engaged; whereas males tend to care far less for story and can happily do through the same gameplay motions near endlessly without ever caring why they are doing them (the competition against other players tends to be what drives them rather than any story reasons). Designing a game that will appeal to both audiences is thus very difficult, but it's one that Mass Effect is perhaps the best example of, combining the action shooting gameplay beloved of young males, and the deep storytelling and romance elements which female gamers seem drawn to. That said, I think there are developers that are seeking to find that female audience that is out there, but they are still trying to figure out exactly what sort of game it is that they need to make for women, whereas with males they have a very clear idea of what sorts of game designs will work.