I watched the video a few times and am wondering if it's possible that what's actually happening is CBC intervening?
http://www.bmw.com/com/en/insights/t...e_control.html
There's a thread over on 1addicts about this:
http://www.1addicts.com/forums/showthread.php?t=578573
Apparently on the M3 CBC is disabled when DSC is off. On the 1M it remains active by default even if DSC is off.
Just food for thought.