I do know the same thing and looks like 60 fps. So, if the above is true, 60/120 Hz should be fine. 144 Hz should be a bit juddery.
ok, so an update ..
Bought a Razor Deathadder Elite mouse.. stops on a dime now.
It offers many settings for the mouse, most of which i dont have a clue what they do, guess i will learn.
I play with a kinda old computer on a TV screen and i get little to no lag when playing Windowed 1024x768 and it's the only way for me to play smoothly.
But at some weird occasions i do have the kind of lag you get that can scrap you a hole in no time. It's rare enough to not rage at a point to buy a new computer :)