Well I just got my 2500k and while I haven't even started using the system that I put together, I don't plan to OC it for probably over a good year... Why you ask?
Why I ask!!! The 2500k is going to act like a raped ape in most any program that most people will throw at it (not originally intended as a Big Blue Gorilla joke, but now is ).
Now when newer programs/games come out that start to tax it and the GPU is no longer the limiter in the games, then I'll start a good OC. At first I may just see how far I can push the 2500k so that in the future I know what to expect. Even if I do OC now, its not going to be eye bleeding, I value the life of the hardware more than I do 1 more FPS in a CPU intensive game at this juncture.