[rjj]

I was thinking the same thing. I've tried the Magic Mouse, Logitech Anywhere, and Logitech Marathon all to no avail. I returned them all eventually and now I'm back to the trackpad.

Just from anecdotal evidence from someone who can detect the lag with 3 different mice, it's not there with the trackpad.

[baddox]

Honestly, I'm not convinced that lag is the problem more so than acceleration. I've never been able to disable acceleration since Tiger, so I don't have that information. Since it's quite reasonable to have acceleration with a trackpad, I've never had any problem with Mac trackpads.