Not surprised at all. As mentioned earlier, there are certain rules in marketing that dictate what you can and can't do with lead characters. The primary rule is that your lead character must be a man, and he must be white. Any time you break these rules, you lose sales (that's the basic gist of the market research anyway). To counteract the loss of sales by having a woman as the lead character, the easiest solution is to appeal to the male player's protective instincts. It's annoyingly transparent and well known, and that many of you refuse to see through this paper-thin situation is even more annoying.
Ask yourselves this: Even if you appreciate the added realism of having someone suffer in the bad situation in which they're put (which I certainly don't have a problem with as long as it's not overdone), do you really think it's a coincidence that the first game in a long time to do this uses a female lead character?
I might have bought this argument if it was a new IP. TR is already a hugely popular brand and they didn't really have to worry about sales as long as they made a decent game.
The whole thing about realistic reactions is pretty new in the industry. Naughty Dog is leading the pack in that department and it's pretty obvious to see the influence of Uncharted on the TR team. I think you will see more games coming out with similar character interactions in the future and they will have male characters in those positions. So yeah, it's is a bit of a coincidence that TR came out about the same time as this movement towards more realism (in characters) is starting to get traction and we are getting tired of same old FPS that hasn't evolved in those areas since Quake.