Well, this is sad when I feel I have to go to Ubisoft's defense when I don't care either for the company (not until they give us that sequel to BG&E anyway) nor the Assassin's Creed series.
But here is my pick on it : From What I've played (mainly the first two, though I haven't finished either), that series has always been mainly story driven.
So the way I see it, they started writing a story with one character in mind (I suppose I could be completely wrong about the quality of the writing but we won't know until it comes out). That character being a white male dude, Arno. Since each game seems to focus of one set of ancestral memories, I can totally see them not going the mass effect route where you create your own character (which isn't really the point of the game). So the whole production team would concentrate on making the character work and so on.
Now people complain about the lack of choice in co-op mode, But from how that co-op mode seems to work, each player plays as the main character and sees the other one on his screen as someone else. People can't choose what they will look like and wouldn't even see it anyway, so I can totally see why the developers didn't think it would be that big of a deal not to implement "playable" female characters (I put the quotation marks there because players wouldn't even actually play them, since to them, they would be playing the main dude, it's only on the others' screen that they would show as female).
So for once, I think this is one of the very rare times where the developers have actually been honest as to why they didn't put the feature in the game instead of having some PR statement that doesn't say anything (like most of what came after it, including the PR rep always present to shut the dev down whenever they're asked about the issue). And the actual bullcrap thing that has been said is the stupid quote from that Jonathan Cooper about it being a two-day work. That thing has our entire animation department climbing the curtains because it makes it sound like everything can be done with the snap of a finger when it actually takes hours upon hours of work (and it certainly isn't just about animating the damn thing anyway).
They never said anything about it being just a money issue, it's all about workload and time frame, here.
So yes, they could totally have planned it better from the beginning or written the story from a female character's point of view but I can see why it all happened that way. I haven't heard anyone complaining about Liberation not giving the opportunity to play as a dude and I assume that's because the story is about Aveline, not some random character created by the player.
And comparing that to any open world game with character creation features and where it's more about the sandbox than the story (or where the gender doesn't matter, I guess, which is why that whole argument could fall flat right on its face when we finally get to know the story) seems a bit unfair to me.
I am totally all for more diversity in playable characters, but I still want it where it makes sense and to be about strong and interesting characters more than just generic blank skins so some people can feel better about it.
Anyway, just my two cents. But it happens so often that stuff need to be cut from development for purely logistical reasons and then they're called racist/sexist etc...
Mow don't get me wrong, I completely agree that there is something wrong with female representation in the game industry (the whole story about Dontnod trying to sell their Remember Me pitch is quite a good illustration of that) but I don't think this particular issue is the best place to fight for it. It reeks more to me about escalation due to misquote and PR fuck up than actual sexism on Ubisoft's part.
At least now I know why developers can't be honest about why they don't include some features. But then, I shouldn't be surprised, after all, this is the internet...
And to conclude, I'm going to repost that quote that was mentioned in the editorial discussion because that guy deserves a high five:
http://www.reddit.com/r/assassinscreed/comments/27ut97/distinct_lack_of_female_characters_due_to/ci5z8i7