gswitz
FWIW, I went to Best Buy the other day. My kid's karate instructor works there and has a music degree. We hooked up my laptop to a touch monitor and played with Sonar. I ran the latency monitor and it stayed yellow while plugged into the touch screen. It never went red which was hopeful, but I decided I'd have to be prepared to not use it during critical recording in order to risk the purchase.
.
I then went through a variety of their laptops running DPC Latency monitor. I stayed yellow at all times on every touch screen monitor laptop we tried. Of course, these were just standard issue Best Buy machines, but I thought it was interesting.
Windows 8 Compatibility: The DPC latency utility runs on Windows 8 but does not show correct values. The output suggests that the Windows 8 kernel performs badly and introduces a constant latency of one millisecond which is not the case in practice. DPCs in the Windows 8 kernel behave identical to Windows 7. The utility produces incorrect results because the implementation of kernel timers has changed in Windows 8 which causes a side effect with the measuring algorithm used by the utility. Thesycon is working on a new version of the DPC latency utility and will make it available on this site as soon as it is finished.
DPC Latency Checker for Windows 7, Windows 7 x64, Windows Vista, Windows Vista x64, Windows Server 2003, Windows Server 2003 x64, Windows XP, Windows XP x64, Windows 2000
The above is from the DPC site.