The m vs f Inquisitor picture really gives us an idea of how easy it would be to skew the results. X1 has around 25% female Inquisitors, and PC has around 45%. That's a huge gap and neither of those results should be used alone. We cannot take that xbox poll alone and use it as if it were significant. A result that can have a margin error somewhere around 15% is not meaningful in this kind of conversation. Even that DAI number seems flawed, because that 32% looks like a simple arithmetic mean, not a weighted one.
And I'll plug Manveer Heir's talk again, where he makes a point about female protagonists and sales, In short - those games have less than 40% of marketing funds (and games that let you choose below 50%) that male hero only games get.
Part of it really is a self-fulfilling prophecy. The industry thinks certain games won't do well due to ingrained prejudices about their own audience, so they don't give it the opportunity to do well by providing similar funds. I think that most players, regardless of gender, will give a game a chance if they think the concept behind the game is interesting or looks fun.
In a way, I think something similar can be applied to the comics industry and their occasional character shifts. We get a female Thor, a black Spider-Man (the introduction of this one seemed really well done, a passing of the torch), and various other things, but they don't want to take a chance have a new character of some minority and give their audience the benefit of the doubt that they will consume the material if they find it well done, regardless of who the hero is, what their background is, or who they are attracted to. There are occasionally such new characters, but there need to be more.
(I don't have a great interest or stake in these comics things, I'm only aware of them from following various news sites.)
There are guys who pick Princess Peach in certain Mario games because her special ability is to float; they don't care that she's a she, Mario's gf, and is covered in pink. Princess Zelda is insanely popular with both genders, as is her alter ego Sheik.
I'll admit that I don't know how accurate this comparison is, since I haven't played either franchise, but it seems like you could compare something like Tomb Raider (female protag) with Uncharted (male protag). Yes, I get that Lara Croft has been occasionally sexualized, but it IS a highly popular series where male players play AS the female protagonist, being a badass, not being 'fridged or in need of rescuing, etc.
Uncharted 4 spoiler...
It really seems like we take two steps forward, one step back sometimes... But I do think the gaming industry as a whole is moving forward.
Honestly, I think every product needs this message on the box: "If you liked this, please tell us about it! *Website*" It is so frustrating to know that people are more likely to complain than praise, so the complainers feed off each other.