I guess I'm not surprised by the TCH cruise control behavior. I've had cruise on the last 7 vehicles I've owned, and rented over 100 cars in the last couple of years, and every one of them will speed up going down a steep enough hill. They all regulate the speed simply by adjusting the throttle. None also use the brakes as part of the cruise control system. Now, the TCH does coast a LITTLE freer than most other vehicles, but the difference is small.