It is interesting, you would think two motors and a heavier car would not allow that. The reason being the EPA ratings assume Range Mode is employed. This allows the higher powered motor to "sleep" .
At the risk of sounding biased (I am a little) I think the 2015 MS, esp the 85D, is the best deal out there. Built after the initial problems, and before production hell.
Makes sense. Does range mode compromise handling, nimbleness? Non AWDs are cheaper, but I want more sportiness closer to M3, but with more size.