I'm calling it a flagrant 1 1/2.
I was happy to see Pierce and the C's maintain their composure; Dwight was frustrated, but they kept their cool and didn't do anything stupid. I'm wondering, though, if the refs might have called it a Flagrant 2 had Pierce reacted differently.
And yes, I've been watching the C's long enough to know that if it was Perk laying that foul on Vince Carter, Perk would have been ejected immediately. His reputation is such that he absolutely gets held to a different standard. We've seen Perk get tossed before for very similar plays.