I thought he had some good material, but not all that much. Wouldn't mind seeing him as the first or second act, but I wouldn't pay to see him as the headliner. I found your idea of his material getting old to be true about halfway through Last Comic Standing.
Caught Daniel Tosh's hour on Comedy Central again the other night. That is one of the best sets that CC airs. It's uncensored on Netflix instant streaming, too.