Good grief, this is certainly an emotional discussion.
I spoke to a guy from triptek about how they programmed the TPMS in my coach. He told me that they set the ideal pressure at 65 degrees and then report back what the pressure should be at the actual temperature. For example, my front tires require 120 PSI at 65 degrees. But if I'm filling them at 90 degrees, my TPMS will ask for more pressure.
As far as I know, the triptek is the only system I've seen do this.
I'm not sure I agree with this because it could lead to over inflation, but it certainly sounds more sophisticated than hitting my tires with a billy club.