Re: CM Punk has surpassed Jericho...
Credibility-wise, easily. Jericho was one of those guys much like Kane, Benoit, and I imagine Daniel Bryan will probably be, who was credible enough thanks to his talent that he could float around the card regardless of where he needed to be and still maintain credibility. He could job to a midcarder to help get a title over one week and go over a main eventer the next week and people would buy it. Credibility-wise he was never at the top but right below it, and would be used to repair the midcard and tag team division as needed, and also provide filler feuds for the top stars.
CM Punk is obviously above that, and is a top star in his own right. Talent-wise I'd say they're close, but I prefer Punk.
Not too sure if I agree with matches though. If we're just talking WWE, I'm pretty sure I've enjoyed Jericho's matches overall more than Punk's. I'm not saying Punk doesn't have a good resume of matches (especially if we count pre-WWE) but Jericho's I'd still say is better.