Correct, except I'm using ML.
I would like to upgrade to Mavericks, but I'm seeing too many problems reported in the forums. Sleep/wake issues, USB 3.0 issues, Nvidia driver issues, and did they ever bother to fix SMB support? Because that last one was a deal breaker for me.
If you're running any ML version later than 10.8.3, then it should work without doing anything extra, as well. I haven't heard about any issues with Mavericks and the GTX 6XX, but I haven't been around any forums for a while.
USB 3.0 issues? I haven't heard anything about USB 3.0, or SMB issues, nor have I ever encountered them, but have you heard anything about such issues after the 10.9.2 update? Both always worked fine with me.
I only had NVIDIA driver issues with a Late 2008 MacBook Pro with a 9600M GT at the end of last year, and that was probably due to the CUDA drivers I had at the time, which has also been updated recently.