Mouse max speed? (m/s)

Not sure what exactly you are trying to measure here.
That would be the speed of your hand movement * the DPI of your mouse. It would also depend on your resolution (higher resolution = slower movement since we have more 'dots' now) and would be limited by how fast the mouse input sensor is working (i.e. it can only detect x number of inputs in y amount of microseconds).

I think DPI is a good measure of how 'responsive' a mouse can be if that's the information you are after