The Spurs lost three of the first four games, so I don't know how the alternative, playing defense, could really be worse.
Tim doesn't have to guard Dirk on every possession just because there's another big. Tim also doesn't have to gamble on defense because he's the only shot blocker in the lane as the guys for the other team speed past Barry and Finley. I think that the offense runs a thousand times better with the threat of the high/low, the second post presence, and the ability to get putbacks. It opens up the three point shooters to actually get passes in rhythm, which they are NOT getting this series.
I can't believe that neither center is getting any minutes at all. Considering the way the Mavericks have completely dominated this series, I don't know how there aren't more people calling for a lynch mob after the last five games.