I counted about 12, but even if we go with your number, that means he goes from 85th to 70th ranked among all centers. That's still not "fringe 2C", that's still smack dab in the better producing 3C range.
So, I decided to actually put together some stats and ranked the top three centers based on face offs taken (excluding obvious players that haven't been playing center, but taking faces off) to address this issue. I only did playoff teams, because I don't have the time to do all the teams in the league.
In terms of PPG. Bonino comes in at 36/48.
In terms of actual points he comes in at 36/48.
So, I guess I'm exaggerating when I say he is a fringe 2C. I think his starts obviously have a lot to do with this.
When we organize the list by zone starts he is #13 in terms of zone starts with players like Koivu, Kesler, Hayes, Dubi, and Kadri ahead of him which I would assume you would consider # 2 centers or at least them handling those minutes gives their 3C more chance to be offensive.
In terms of players that are ahead of Bonino in terms of zone starts that I'd put in the class of 3C we have Letestu (34pts/.45PPG), Kruger (17pts/.22PPG) Berglund (34pts/.41PPG).
Behind him but still over 50% in terms of d zone startswe have Vermette (28/.38PPG), Jarnkrok (31/.38PPG), Karlsson (25pts/.30PPG) and Smith (32/.43PPG)
Bonino for reference had 37pts at a .46PPG. So in terms of players that were playing similar "starts" as Bones as a 3C the only two close in terms of points and PPG were Letestu (who put up 13 points on the power play) and Berglund (who I have said is someone I'd like to see the Pens target since Sobotka and Schenn likely make him the odd man out).
Bonino is clearly in terms of production when you consider his minutes one of if not the best producer on the third line in terms of playoff contenders.
Obviously, his line mates and the Pens system play into that, but can we at least admit that you guys are severely underrating his abilities?
In terms of other centers that were above 50% in D zone starts we had Kesler, Koivu, Backlund(who is an absolute beast at 64% and a .65PPG.. maybe we should trade Jake for him
) Kadri, Fisher, Plekanenc, Hayes, Dubi, Statsny, Getzlaf, Danault, Staal, and Nuge.
I guess if you want to consider Koivu (58pts/.73ppg), Kadri (61pts/.74PPG), Fisher (42pts/.58PPG), Nuge (43pts/.52PPG) and Pleks (28pts/.36PPG) as 3Cs (I believe most of them were playing 2nd line type situations judging by the way their teams are set up in the pivot) I've included their numbers. I still think Bonino outside of Kadri and Koivu proves he could hang with those players.
Finally, in terms of zone starts and centers Malkin is the lowest in D zone starts and Crosby is 42nd out of 48.
Pretty obvious that is going to change this year and we will likely see it reflect in their point totals.