I've experienced the "fake out" also, only twice. I figured out that at the very end of braking, I tend to let off the brake slightly to make it a gentle stop. Now that I am keeping even pressure applied to the brakes, the auto stop has not "hicupped".

As for warming up, I also had an HCH I and now an HCH II, I fopund it took about the same time to warm up. On my commute, the auto stop seems to kick in, on the new one, at the exact same light as my previous one.

Retired: 2/11/06