Interesting. The pedal sensor is just a dual sensor (for redundancy). One is sending 0-5v and the other 5-0v. There is not even physical kick-down switch. What could this emulator possibly do to speed-up the throttle response except send a full throttle signal when you only press the pedal partially?
As a matter of fact I am annoyed of my X5D transmission downshifting too much, especially at lower gears. If I even find a way to re-program it to keep higher gear I would do that in a heartbeat.