Keep in mind that this team mindset isn't just by accident. The team has been built with players that have that level of maturity and professionalism. Probably why Blake Griffin is on the team and not Dwight Howard or Cousins (at least so far).
Blake should actually be a perfect veteran presence for the team. Like Horford is. They are not the best players on the team, they have their roles, but seem OK with that. We'll see how well Griffin's body holds up. That is the issue of course. But so far, I like the leadership.
My impression of him is based largely on the playoff series with the Nets last season. He played decent at times. It appeared to me that he just got gassed very quickly. He had only played 6 total minutes in April prior to Game 3 (8 min) and Game 4 (18 min). Not sure what was going on but he was not in game shape. Like they threw him out there as an afterthought, out of desperation.
Hopefully the Celtics can get him physically ready.