I am running the 14.104a kernel on my quad core. I tried the TH version, and it ran, slowly, and very jerky, for about 45 minutes. I never got more than about 30 minutes with the 14.105 kernel, before it hung. Then, I shut down the TH version, and tried the original version. It too was very jerky, so I shut it down after about 5 minutes, and started the AF version. That still causes a slowdown, and I can't tell, for sure, what the temperature is (seems to be cooler), but it is still running a few hours later.
I also started the AF version on my T510. It is also still running a few hours later, but it hasn't been doing anything except run the Doodle Screen Saver Cairo clock.
In both cases, it seems that the machine is far more likely to hang when using the 14.105 kernel (or Murphy is playing games again). It also seems that the AF version is much faster than the other versions, and that makes it much smoother, but I can still detect some jerky mouse movement. The CPU usage, on the quad core, seems to ride at about 50%, when idle. The T510 (no HT) seems to idle at about 60% usage. Both using the AF version.
The "slow" operation seems to have something to do with disk operation. (Danis on the quad core, and OS2AHCI on the T510). When I watch the disk led, I see about 20% duty cycle with operations where I expect to see 100% disk activity. If I get a program loaded, that doesn't use much disk, it seems to run reasonably fast.
I am not sure what to make of all that...