I still think the data doesn't tell you a whole lot because there are plenty of men and women who play opposite sex PCs. Unless you assume that behind every male Shep/Warden/Quizzie there must be a man... I have no clue, but does that data factor in multiple playthroughs? Completed playthroughs? Playthroughs from when you've had the game for six years and are only just now getting around to playing it?
It doesn't seem very helpful, is all.
This is one component of it, certainly. In one of those threads, part of that data on race creation counts ANY character created, regardless of whether the player went on to actually play the game with them, only played through the origin story just to see it, deleted it after loading into the game because their face wasn't perfect, and so on.
Also, the reason that such polls are unreliable is that the respondents are self-selecting. Since that old poll was for XBox, what if there are a higher portion of males playing on the XBox versus on Playstation or PC? Obviously, most of those males are likely to make a male PC, and reply that they did so in the poll. There is also the matter of the base audience for a game. I wouldn't be at all surprised if the audience for Dragon Age skews higher female than it does for Mass Effect. That franchise, despite its use of female Shepard, hasn't treated the female PC equitably (in terms of romances, and such). Perhaps that changed over time, but it can create an initial entry barrier.
Also, just because certain numbers are "all we have" doesn't mean they deserve to be taken seriously.
At the 2013 GDC, David Gaider gave a very insightful presentation about Sex in Video Games. There is one segment where he talks about the marketability of the female protagonist -- bookmarked on the left under Female Protagonists. It's not necessarily so much about what the player chooses to do, but about "conventional industry wisdom," that of, "games with female protagonists don't sell."
He gives an interesting example of how, during the boom time of Everquest, when its peak sub base was < 1m or so, the "conventional industry wisdom" was that that was it as far as MMOs go... and then along comes World of Warcraft and blows the f-ing roof off the place.
There is also "the way things are that reinforces the assumptions that we already have." Oh, a bad game with a female protagonist didn't sell well, not because it was bad, but because it has a female protagonist.
There are several such things all throughout the presentation.
Incidentally, DG is really good at giving these presentations, and he comes across really differently when he's talking to other devs, rather than gaming media or fans. He's in his element here, and it really shows that he knows what he's talking about.