How is he anything more?
Was he drafted by this team? No.
Did he spend any significant time with this team? No.
Did he cause or even take part in any significant post-season success with this team? No.
What did he do? Break a record thanks to heavily over-inflated post-lockout scoring? Great.
The guy was here for 3 years. He was a very exciting player to watch, and IMO, he's the greatest European player in NHL history. That doesn't make him any more significant a Ranger. He was a stop gap player on what were, taken as a whole, terrible teams
As a Ranger fan for over 20 years, words can't describe how much more Ryan Callahan means to me as a fan of this team than Jaromir Jagr. Wayne Gretzky is a more important Ranger than Jaromir Jagr, and Wayne Gretzky wasn't all that important a Ranger himself.
The Rangers should never have traded for Jagr to begin with; maybe they wouldn't have been mired in mediocrity for years to come.