Dhruin
SasqWatch
I don't know how interesting this is but Eurogamer has a Tech Analysis of Mass Effect 2, examining the frame rates and technical improvements of the sequel, particularly on the X360. Here's a quick sample to see if this is your thing:
More information.There are similarities with the first game. Cut-scenes can and will drop down to 20FPS in order to maintain the excellent detail levels BioWare demands from its characters, and there are still jumps in places between 20FPS and 30FPS during the arcade sections, but overall performance, particularly when it comes to tearing (now at 2.5 per cent in these clips - most of the time ME2 passes as a v-synced game), is obviously smoother.
This has all been achieved with a range of technological improvements across the board, combined with sharper level design more in tune with the limitations of the engine.