That's a great point worth some discussion. Personally, I think that because the Spurs are such a cerebral team, and one that relies of precise execution, instead of stunning athleticism, it seems they do demonstrate a tendency for what can appear to be soft play. Especially when they face a very aggressive opponent, they don't always seem to match that aggression.
When their heads are not in the game, it seems their basketball fundamentals and attention-to-detail also suffers. We see this manifest itself in a lot different ways, like the rash of unforced turnovers, sloppy passes and various offensive and defensive breakdowns. These miscues often tend to "spur" the opponent and shift the momentum in favor of the opponent.
To counter it, sometimes a team requires a spark. A vicious dunk, a key steal or a stunning block can go a long way to shift that momentum back in your favor. Unfortunately, that doesn't always happen with the Spurs. Most times, the Spurs must methodically wear their opponent down and out-execute them to win. If they don't execute or if there is l
The Spurs are never going to dominate opponents with superior athleticism or quickness. This team is talented, but is does have it's defensive flaws. As such, their margin of error is very slim and they don't always have the luxury of being able to survive a piss-poor effort. Therefore, it's essential that they have the right mindset and the right amount of focus, attention and level of effort. Fortunately, we've not seen very many lapses for long periods this season, as we have in years past. That's why they've been so successful up to this point.