So, the car is almost 300 pounds heavier (depending on options of course) than the E60 M5. It is no longer lighter than its rivals. You were saying something about Efficient Dynamics BMW? The car performs amazingly well and definitely outperforms the E60 M5 but imagine if it weighed the same or less than the previous model. No wonder it needs so much power. That turbo motor is also causing BMW to shy a bit away from its famed 50/50 distribution claims.
It is a great car, no doubt about it, but BMW weights need to get in check and BMW needs to start doing what its competitors such as Mercedes and Porsche are managing to do which is release new models lighter than the previous generation which improves efficiency.