Yes, then we have even seen numbers on low-jitter.
First of all, a kernel with "low latency desktop" enabled. You can edit Kconfig.hz and change 100 to 90. (search/replace).
You can add idle=poll and tick_skew=1 to boot options. And compile a shaved local kernel by doing "make localmodconfig" from a full distro kernel. (Also remember to turn of high_res_timers if enabled, because then hz will be 4016 or atleast high.)
CFS granularity should be set to 1158500nS. (Current setting is a bit high, and may give jitter)
Renice X to -20, to prevent X being a bottleneck.
Remove 60hz limit in doom 3, to avoid timing jitter. http://paradoxuncreated.com/tmp/AutoExec.cfg
So as I said, I ordered a computer with components optimized for latency. An E5 workstation, which I installed a GTX660 in also. HexaCore. What can I say, I am very pleased with the results. This is the kind of computer I have wanted for a long time. Highly recommened for all low-jitter enthusiasts, and media professionals. Even windows (xp) runs 1ms streams now, with webcam recording at the same time, without drop of frames or clicks.