From the digitalfoundry Splinter cell face-off thread:
http://neogaf.com/forum/showthread.php?t=662477
Save for drops to the 25fps mark during some cut-scenes, the good news is that both
PS3 and 360 versions hit this midway 30fps target consistently enough to make gameplay feel fluid. However, this is only made possible by means of some very aggressive full-screen tearing.
Adaptive v-sync is in place for each platform, which causes frames to chop in half when the hardware is being pushed beyond its limits. Engaging
V-sync is permanently engaged for Nintendo's platform, adding to its credentials as one of the better-presented versions of the game overall - and it even outperforms the 360 during earlier in-engine cinematics. However, from the moment Sam Fisher enters the Paladin aircraft, it's clear this isn't to last. We suffer from
lengthy bouts of 20fps performance during most briefing scenes here, plus similarly sluggish levels of refresh while at the heart of larger shoot-outs.