Personally I think people are underestimating McCown's potential. Maybe I'm totally wrong here, but I see McCown in next year's top 10 for QBs as long as Denny Green doesn't put Warner back in there in week 7.
Having said that, it doesn't shock me that McCown and Favre (arguably the best QB ever) beat up any defense.
I do think Carolina was severely overrated, but I don't think it's time to jump ship quite yet. They don't exactly have a great schedule though, as they only have about 5 soft games of the 11 remaining.