I know a UK fan who was adamant from the moment Cal signed his big extension (which was right after a run to the Elite Eight, not since they've struggled and it has become really easy to pile on him) that he would mail it in and his best days there were behind him. He was upset UK offered him that cush of a deal, no matter how good of a coach he was.
I laughed it off at first and thought he was being dramatic, but he appears to be dead on so far. He hasn't won an NCAAT game since he signed that extension.