@ Garnett
What they stated is that they use all of the available CPU time, by that measure XBox 360 launch titles already maxed out the XBox 360.
But what Naught Dog stated:
"I'm sure people have seen reports in the past where we said we were using '100 percent of the PlayStation 3,' and we're not lying or exaggerating when we say that." But Druckmann said the studio doesn't intend to imply that the console is maxed out. "What we mean is that none of the SPUs are ever idle. They're working 100 percent of the time. In the first Uncharted, they were idle about 70 percent of the time, because we were just on the GPU."
http://www.gamasutra.com/php-bin/news_index.php?story=26074
So let's keep this accurate.
All that Naughty Dog has proven is proving a lot of vocal 360 fanboys wrong that developers would never put those 8 processors (OS + game) in full use. Naughty Dog did this already with Uncharted 2, utilizing all the CPU resources available to them, but there are a lot of oppertunities for optimizations, especially when having to optimise for 8 different processors in use within PS3 games and OS.
Optimization you could view as re-coding parts of the engine to do the same or more using up fewer CPU cycles.









