Maybe you can "fix" this problem by making your Cintiq your PRIMARY DISPLAY in the display settings.
Not the most convenient approach, but it does get rotate and touch working properly.
I'm talking about the barrel rotation of the pen, much like the pressure sensitivity or the tilt. Not the rotation of the canvas.
Got it working. Here's what I did, in case anyone else out there ever runs into the same problem:
I installed an older version of the Wacom drivers (6.3.10w2). (I didn't uninstall the newer ones, I just installed the older ones ontop of the latest ones already installed on my system). Once installed, all tablets on my system stopped working (Cintiq27, Intuos4). Then, restarted the system.
After reboot, all tablets still did not work. So, I re-installed the latest ones. (Again, I didn't uninstall anything). Then, re-booted again.
This time, the tablets worked, and I had to re-calibrate. After that, pen rotation worked.
A very strange run around here, but it worked. Anyone else who experiences problems with pen rotation, tilt or sensitivity might want to try this routine to see if it works for them.