Whatever you've experienced isnt always helpful unless you can prove it which apparently you couldn't a while back when you were asked for backing up your theory regarding throwing out the t-stat and simply came up with the answer that its the PAKI WAY of THINKING.
You say your 3 cars are "properly" maintained. Tell me, did you throw away the t-stats from all of them? Why? What made you think this is a good thing? Surely you must have reasons for doing so and suggesting it to others aswell.