Agreeing with the OP the one and only downer my wife has about this game is she is being forced to play a male character, its abit like a slap in the face or saying "its not a girls game" yes I understand the faq reasoning but still to bring out a multiplay 2011 game without atleast one female model didn't anyone think right from the start I mean borderlands/l4d/mmo's and yes I realise with brink's level of customization it would take time.
I disagree with your logic because that would mean games such as Heavenly Sword and Metroid (or hell, even Tomb Raider) would be saying they weren't "guy games," something I simply cannot bring myself to agree with.
or too put it another way how would you guys feel if it had been only female models and you hadto wait till brink 2 for male models ?
Well, to use your examples:
In Borderlands, which I bought on release date, the first character I chose was Lilith. Why? Because the gameplay style that came with choosing her (Phase Walk FTW) suited me - the fact I was playing as a female didn't bother me in the least.
In the 4 or so years I spent playing WoW, I played as both male and female characters. The main difference between the two genders is the voice you hear when you use an ability you don't have enough mana for, so I could have easily played as only female characters without a second thought if I had to in order to enjoy the game itself.
L4D2 (Didn't play the first at all, and didn't play the second much outside of a demo) I picked the redneck guy because I thought his voice was funny... so I guess you got me there.
In addition, my main character in Mass Effect 1 and 2 is female simply because the voice actor for female Shepard is better than the male actor - otherwise I couldn't care less about which gender I play as in those games.
In short, if Brink only had female models, I'd still pick it up as long as they were rendered in good taste (meaning they didn't make every model have unrealistically massive briasts with more skin shown than clothes) because I play games for the game itself, not as a way to represent my gender.