I would disagree with Stoudemire, actually, in regards to the Spurs being a dirty team -- well, aside from Bowen.
Bowen is a dirty player. As dirty as you'll find in the NBA today. There's no doubt in my mind that stepping on or kicking the back of Amare's heel was intentional, just as he likes to stick his foot out underneath jump shooters when they're landing on a shot attempt, as Ray Allen, Vince Carter and Steve Francis have accused him of doing. And then there was the knee in the crotch on Steve Nash.
And Manu Ginobli flops constantly. Same with Oberto, actually.
But other than that, I think the Spurs team is best described as "tough" -- it's like all of their playoff experience has kind of taught them what refs will and won't call, and how the officials swallow their whistles late in games, and they take full advantage.
On another note... I never realized how tough Steve Nash is. Guy's had his nose gashed open, been kneed in the junk, checked into the announcers table... and he just keeps getting up. Much respect goes to him.