Electric cars have like zero drive train loss as well as get 100% torque from zero throughout their entire rev range. Not to mention I think the Tesla Model S is all wheel drive. Even though the Model S is a whale considering its weight, we can see the effects about how important it is for how a car puts its power and torque to the ground.
Also, yes the M5 did not use Launch Control and was a bad launch by the driver.
Currently saving my pennies for the 911-Fighter. The McLaren P13 500S.