HDDP...Do you have a Sprint Booster, or driven a car with one?
I'm not trying to be a smart a** or anything, but if you drove one with a Sprint Booster, you'd know just how sensitive it is.
I had to learn how to drive my car all over again, with a light foot, too keep from spinning the tires on accident.
So its real easy to tell a difference just driving one like a normal car.