Yeah I've got a Mx700 and there's no difference that I've noticed in reaction time. It's right there with a corded mouse. I'm not going back to a corded mouse either!
Intel C2Quad Q9400 @3.6Ghz | Asus PM5Q Deluxe
| OCZ Reaper HPC PC2-8500 8GB
| XFX Black Edition 260/216| knobs are great for twisting, turning, squeezing and pulling... especially your own..... that's how doors open | Chaos Havok:
grrrr im lagging me | <@Deathspawner>
I wish I was in Windows :-/