Of all the random arguing going on in this thread, I think Whott nailed it:
Dallas beat SA in 2006 because they ran iso-plays. They'd use a screen or two to get a mismatch, but iso was their key ingredient. The Spurs' D thrives against passing-oriented offenses. AJ knows this best, so all he did was isolate his best weapons 1-on-1.
Now the Mavs' easiest points come when they get out faster on transition with Kidd looking to create an easy bucket for Dirk or Dampier or whoever else. Believe me, the Spurs play best against that type of offense (see Phoenix). Kidd + scoring weapons is like Nash + scoring weapons, except:
a) Nash is a better shooter so you cant sag off of him. With Kidd the Spurs are going to dare him to beat them. They're going to stay home on Terry and Stack and give Kidd the look.
b) Amare is way more athletic inside than any Mavs finisher (Dampier, Dirk, Howard). You're not getting any easy points inside.
If Avery goes for the iso stuff they're still going to leave Kidd alone and bring help from the weak side. Should be good stuff, especially since the Spurs seemed to have picked up their D in the last few games.
Dallas will no doubt rebound well, but that won't be enough.