Kanter is a funny one. Yes, his offense is effective and yes to other posters, the Celtics have plenty of offense on the court most of the time. Watch him play defense. He isn't animated, he isn't "working his position" on the defensive end.
This gets us back to Perkins and Rondo. "Just let the three hall of fame scorers do all the scoring...ok?"
Thus, we see Theis fitting in with the "big 4" quite nicely. He plays his position and knows his team mates and voila...starting center and effective on defense...for a German guy who is kinda small.
I hope that Poirier will be good on defense and thump underneath. Haven't seen much from him, but, he plays more aggressively on defense than Kanter...which isn't saying that much.
Robert is getting better and some day will be on the floor in big spots.
Grant is fine for 6'6" center who doesn't seem to have an outside shot. Excellent foul shooter. Superb with positioning on defense and doesn't do dumb things.
The above agrees with the poster. Technically? Kanter should be behind everyone from a minutes stand point except Bill Russell isn't walking through that door.