I play TF2 almost hours every day and I'm often in the top 5 players in the server when I play sniper or soldier.
I play in Mac OS X and I use a Razer Deathadder 3G Spawn. No extra drivers.
However, I tried wiggling the mouse pointer and I can't see a lag on my iMac, but if I grab a Finder-window and wiggle it left-right very fast I think there's actually some lag.
I can't really compare TF2 to Windows since in Windows I use the Razer drivers. But yeah, the mouse in TF2 in Windows feels a bit more "glued on".
Edit: Just tried the Explorer-wiggling in Windows and it too felt a bit laggy.
I really wonder if the "input lag" problem is as simple as a design difference. For instance, if on Windows the mouse position is polled immediately prior to rendering the screen but on OS X it's polled immediately after you would get a different feel.
That would introduce about 8ms of "lag" if you're really dialled in and able to perceive it.
I play in Mac OS X and I use a Razer Deathadder 3G Spawn. No extra drivers.
However, I tried wiggling the mouse pointer and I can't see a lag on my iMac, but if I grab a Finder-window and wiggle it left-right very fast I think there's actually some lag.
I can't really compare TF2 to Windows since in Windows I use the Razer drivers. But yeah, the mouse in TF2 in Windows feels a bit more "glued on".
Edit: Just tried the Explorer-wiggling in Windows and it too felt a bit laggy.