I don't really have a stake in this argument...but I have always wondered if the active suspension in my F80 is broken. There's no appreciable difference in any of the modes, especially relative to the changes you get when changing the steering or throttle selections.
With that being said, I have never tracked the car, so it might be more apparent in those circumstances.
The adaptive suspension in the M2CS isn't a positive or negative, based upon how I have experienced it in the M3. Just my $.02...