I think 55 points is a fair expectation from Zajac. That's pretty much what his pace was playing with Jagr this year (44 points in 66 games on the same line).
I guess it depends on how well Cammalleri gels on that line, but I don't think 60 points would be a huge surprise.
Zajac's pace last year was also after only becoming Jagr's full time center around the 20-30 game mark. Jagr has a very particular way of playing and demands a certain style from his linemates. There was still an acclamation period that took place for Zajac and Jagr. It took a good dozen games for them to really get a good feel of each other's games and even then, early on in their chemistry experiment, Zajac missed capitalizing on many great passes that Jagr set him up with that would have given Zajac an extra 5-6 goals and Jagr an extra 5-6 assists not to mention the fact that if Zajac converted more of Jagr's passes, opposing players would have respected Zajac more and freed more space up for Jagr which would have given more chances to score goals himself. Maybe Zajac is not a natural goal scorer but a lot of those misses were because he and Jagr didn't get each other as well. Jagr plays the game differently than anyone else, his game is vastly different than Kovy or Parise's games were. This will be a different year.
Most are making projections for Zajac based on last year and Jagr based on last year and the assumption he will regress based on his age.
No one seems to be valuing what chemistry and having a whole year to play together will do for them this season. Jagr has said it over and over again how important chemistry and line stability is for him and his linemates. Why do you folks think Jagr went from 96 Pts (despite playing through a seriously repaired shooting arm shoulder) in 2006-07 to scoring just 71 Pts in 2007-08? The biggest factor was he lost his centerman Nylander (he didn't so much regress since he had 15 Pts in 10 playoff games that year).
Cammalleri is not the x-factor that everyone is saying he is either. There were times last season when Zajac and Jagr looked dominant together regardless of who their LW was. Chemistry is extremely important but of course having Cammalleri won't hurt them and will just boost that line's offense.
That is what lends me to believe that Jagr's numbers will go up if he remains healthy (by about 5-15 Pts) while Zajac's numbers will go up too. I see Jagr hitting 30 goals and Zajac hitting 20 goals this season.