Nope. Avery was a legit top-5 guy. There was no surprise factor when he won. He had won NT's, won a Players Cup, and had a lot of top 5 finishes in NT's and majors. He was somebody you expected to win eventually. McCabe had also won a Player Cup when it was a major, but that win was also a surprise as he had no NT wins and wasn't consistently a contender. They were not really considered on the same level until McCabe won his World's. In retrospect their careers look somewhat similar (one Worlds, one Players Cup, success drops off after winning World's as they transition into a brand ambassador) but at the time Jenkins was considered on a different level.
Cam Todd, Eric McCabe and Gregg Barsby are really the only players that caught me by surprise when they won. Maybe Doss the first time he won as I'm not sure I was really aware of him before he won, but in retrospect if his win was a surprise to me in '05 it was because I'm dumb. The other one-time winners since I've been following disc golf were Ron Russell, Dave Feldberg and Avery Jenkins and none of those guys were really a surprise. I mean, other than the fact that ANYBODY other than Climo won in '99 was a surprise. If somebody was going to beat him, Russell would have been high on the list of candidates.