Here's a closer look at Small Ball over the course of the season.
A lineup of Parker, Manu, Bowen, Barry and Duncan gives up 98.4 points per 48 minutes, but scores 122.4 points. That's a pretty good return on investment for Pop.
A lineup of Parker, Barry, Finley, Bowen and Duncan gives up 106.5 points per 48 minutes, but scores 127.4 points. Not as good, but the point spread is still pretty impressive.
A lineup of Parker, Manu, Barry, Finley and Duncan gives up 105.6 points per 48 minutes, but scores 137.6 points. Can't really complain with that.
A lineup of Parker, Manu, Finley, Bowen and Duncan gives up 91.4 points per 48 minutes, and 95.3 points. This is the small ball lineup that Pop plays the most ... and the one that is the worst. It's the small ball lineup that killed the Spurs versus the Mavs. The problem with it is that it's just not a good enough offensive lineup to justify going small.
Overall, with small ball during the regular season, there's not much there for the Spurs to look at and show that it doesn't work. All of these are fairly common lineups and they are all pretty effective. In games where the Spurs can't score and are getting swarmed inside (like tonight), is it really that horrible to go small?
I don't think so ... unless it's against a monster rebounding team or a team with shorter players who can bully the Spurs on the low block (Patterson, Bonzi Wells, etc).