I changed from a 2600K to a 3570K on a Asus p8p67-M-Pro without issue.
Do make certain that you have a bios level that supports ivy bridge.
It was some time ago, and I don't recall any issues. Windows 7 did not even need reactivation.
I updated the BIOS so I think I'm ready. I pulled the trigger on the sale so the i7-3770k is on the way.
I'll definitely post my results in about a week when it's installed.