The author says that the bug is in the OS X kernel, not in any driver, so if he's right, changing a driver would not fix it, which is a pity.
I've also had Windows friends complain about mouse lag on my OS X. I've always thought it was due to the different acceleration curves, but disabling OS X mouse acceleration never seemed to fix it.
The OS X kernel is largely a collection of pluggable extensions. It's likely an extension could take the place of the default mouse driver. In fact, the source might even be available to get down to the real issue.
I've also had Windows friends complain about mouse lag on my OS X. I've always thought it was due to the different acceleration curves, but disabling OS X mouse acceleration never seemed to fix it.