Better than the US, but not as much as you would think. Diversity hires in my office (in China for an American company) mean female, not even the various ethnic minorities that are a more than a bit underrepresented (I haven't met a Tibetan or Uighur programmer yet, but then we aren't out in West China).
I can't find any information to back it up so it's possible I'm wrong. I've noticed this most specifically with Indians though.
If you look at Indian outsourcing shops that employ programmers there do tend to be more females than you would find in an equivalent western company.
If I had to hazard a guess I think the "nerdy" stigma attached to CS is more of a western thing. Whereas in a growing economy a woman who can go out and compete with men is perhaps viewed as more empowered somehow?
