DS shifts much higher than D.
D basically granny shifts at a lower RPM for a smoother shift and better fuel economy.
DS holds it in gear until close to redline.
The fuel injection program and ignition timing probably gets more aggressive in DS also. (dont know this for sure but it would make sense).
2006 330i - Jet Black - 19" E46 M3 wheels - HR Sport - 188,000 Miles...