I am awaiting some reviews. IGN.COM tore the game down big time, framerate and camerawork were the biggest issues.
As for framerate, well, I really dislike it in a speedy game like this. I got games with a few framerate issues, which I don't really actually mind, since they don't interfere, but for example I got F1 2002, and you just DON'T need framerate issues when you're driving fast, it annoyed the hell out of me, and I returned the game and got myself the Indiana Jones game, it also has some frame issues, not a lot, so rarely, but it don't mind, don't interfere and the game is fun.
As for the camera work, that's a bad thing, but on the other hand (but I haven't seen how bad it is), with games as Sonic, to me it's about learning levels, knowing where stuff is .... the first few times through I actually go through very slow (but I'm not that good at it yet anyway), after that you go for the challenge, but you try and try more to learn a level by heart, and even the stuff you can see, it's about being able what to do, even if you don't see it yet. With the 2D games of Sonic you couldn't look ahead and it was a speed game as well.
I haven't played this game, so I don't know how bad it is. I do know that companies these days sometimes bring games on the market they should have tested more, I don't care if I gotta wait another 6 months, the game needs to run well.
Marco