Umm, I've played the demo various times on both consoles. I have played SSX3 to DEATH for years. It's my fave snowboarding game of all time. So yes, for someone with so much experience with a 60fps game like SSX3, going to the new SSX and it's crappy ass framerate REALLY hurts the gameplay IN COMPARISON.
It's not even a debate at this point. Half the framerate is NOT rock solid. 60fps is rock solid. 30fps is... well, it's the typical framerate of games... AVERAGE. That works for cinematic games that don't rely on incredibly quick inputs and the sensation of high speed. It's a massive failure on EA's part.
Like I mentioned on the XBox section, it's like playing CoD at 30fps, when it's been 60fps since CoD2. Cutting half the framerate, well EVERYONE would notice.
Just go back and forth between both games. I dunno how EA could be happy with sacrificing half the framerate...