Does an optical mouse lose its benefits if it is plugged into the PS2 port instead of USB? I have some vague memory that the ps2 port can only handle enough data for like 400 dpi or whatever the term ...

I've got a USB mouse (MS) that came with a USB to PS/2 converter. It works fine hooked up to a PS/2 port. I run it through a KVM switch that is PS/2 and not USB so this is necessary. One of the boxen ...