Okay so this is my 2nd M56. My first one was a 2011 M56 Sport with the tech and aero. I had the option in the menus that said "ECO DRIVE" in that menu I could turn the eco pedal off, standard, or soft. After racing a friend I noticed it was set to standard. I changed it to OFF and the throttle response was amazing. Even when the car wasn't in the actual eco mode, these options still affected the acceleration.
I now have another 2011 M56 Sport WITHOUT the tech package. I don't have the ECO DRIVE menu option but the pedal feels just like it did with eco pedal set to STANDARD on my old M56. Even when it's in sport mode. I'm wondering if this is an option that the dealer can program outside of the onscreen menus.