Remember this from Raptorblog?
http://goo.gl/vKsvH
(removed table showing statistical averages of big men rookies their first year) Dwight Howard, Andrew Bynum, Tyson Chandler, Marc Gasol, Roy Hibbert, Andrew Bogut, Joakim Noah ,Al Horford, Nene, Javale McGee
"If you weren’t already aware that big men, especially centres, take the longest to develop, perhaps this table was a simple reminder. Even taking into account future All Stars and dominant players, none of these guys could average more than 12 points as a rookie, more than 10 rebounds or even crack two blocks per game. Howard’s impressive yet not spectacular player efficiency rating of 17.2 ranks the highest on this list."
One consideration for lowered expectations of Jonas has been a worry he would be picking up fouls like crazy. Haven't seen any indication of it yet. If he can stay out of foul trouble he may average close to a double, double a game.