IGN: http://ps3.ign.com/articles/815/815220p2.html
...The PS3 version is nearly identical to the PC release that will come at the same time. You can even install the PS3 version to the hard drive, though you won't be able to adjust video settings to optimize performance as you can on PC. Right now, the PS3 version is running in 720p. It looks good, though a PC can support higher resolutions and look even smoother.
Mark Rein: I'm saying the demo they saw could have been 60 fps. We have not locked frame rate yet so right now it depends on things like what level they were running and how many bots they put in, what mutators they were running, etc. When we get it finished and locked down it should run at 30 fps all the time..