I am still seeing those annoying keThread::run - delay messages on OS X.
I am right now having to configure asl.conf so that debug level messages from the kernel aren't logged. Not a real solution to the problem.
Please remove them from the release version of the driver. They are annoying, take megabytes of space on the disk, and possibly slow down the system. As you know, syscalls don't come for cheap, so why do you make so many syscalls?