I totally agree to this post - the stuttering and overall feel of the performance being totally gimped even on sweet PC rigs makes the game unplayable. There is a huge noticeable difference in smoothness at 30FPS compared to 60FPS.
Just for interests sake, I believe the reason it makes a huge difference is because of this: your monitor displaying 30 updates to the game screen per second does not automatically mean your eyes SEE all of them. Your eyes are 'polling' visually at 30FPS, they only intersect about 2/3rds of the screens that 'go by' during that second, you Need more screens flying by so that your eyes pick out 30 solid screens of motion from them (or a nice blur like on TV or like seeing 'real life', where it works totally differently).
I was just complaining about this issue earlier today in the other topic: "Poor and inconsitent framerate on good PC ".
Yes, increasing the max fps to 60 via the config.xml seems to have helped, but I am still not able to find settings that work! When i turn on HDR, i get nothing but a black screen when I'm in the game (not in the menu). When i disable HDR, everything in the game is translucent (partially transparent), you can see right through the character, walls, floor, everything.
So exactly what settings are supposed to work properly on a PC, please tell me?
I'm sure the game works just fine on the Xbox. I'm so happy about that (not).