I’m told one of the uses for TimerResolution is to help reduce DPC Latency on Windows. This is supposed to improve performance of many games and applications.
I suspect that all that is really happening is that some poorly written drivers are getting a boost.
A great utility to check the DPC Latency on your system is http://www.thesycon.de/deu/latency_check.shtml, try it with and without TimerResolution running and see if it makes any difference on your system.