Ick. This comment makes my inner feminist go all eye-twitchy.
It presumes that she's completely his inferior. Now, she may be not as good as him at hand-to-hand combat, but that's because he's the goddammned Batman, NOT because she is a woman. She is a cop, and I'm sure when she's up against non-superheroes she is more than capable of taking care of herself. Saying "Oooh she's a woman" invalidates all the very hard work I'm sure she had to go through to get to the position she is in.