As briefly mentioned in the article linked, it's not only about if the picture is percieved as being smooth or not. When playing FPS games the mouse's responsiveness is directly linked to the FPS.
A good example of this is the V-SYNC option available in many games, even though the game runs very smooth with V-SYNC on, the controls are all but smooth, and you end up with a very unresponsive and "rigid" camera.
At least that's how it is for me.
I have discussed this issue with quite a lot of people and some say they don't notice anything while others say they do.
I have always noticed, and it does not matter what kind of hardware I use (it happens with all hardware and all games). I think some people have the ABILITY to notice these kind of things, while others don't (I might be wrong...)
The nightmare scenario is 1) 30 FPS and the responsiveness of the mouse that comes with it, secondly the visual experience which is also greatly reduced. With 60 FPS (at least) it feels good, and I have noticed that with even higher framerates the responsiveness is increased, which makes sense since the DPI of the mouse has increased greatly over the years as well. I dont know the ratio of mouse dpi / framerate for a good experience but its obvious that there must be one. /G
