Premiere Pro CC trial works fine for me. I heard they updated CC on the day that Mavericks was released? Unless I heard wrong, I didn't get an update, and it works fine for me.
Only thing I've noticed is that it doesn't tell me how many days I have remaining on the trial, which is odd.
I'm gonna subscribe to CC this week anyway, upgrading from CS5.5, so if anyone wants me to try CS5.5, I'll give it a shot, but I don't think it worked all that well on Mountain Lion, it doesn't seem worth holding onto CS5.5 at this point if you still are.