When the Model S and X get AWD I assume Tesla will take complete advantage of all abilities an all electric implementation of AWD brings to the plate including torque vectoring. In the Mercedes electric SLS they take it one step further by powering each individual wheel. See the video: Mercedes SLS Electric Drive. Can Volts Ever Match Pistons? - CHRIS HARRIS ON CARS - YouTube Do you think Tesla will implement this ALL AWD (4 motors) system with toque vectoring in the Model S, Model X, or some far distant super car, maybe the new Model R? Do you see big safety and /or performance advantages of four separate electric motors (one for each wheel) over two electric motors (one for each axle)? All I can say, is after watching this video I am excited about Tesla/Mercedes future collaborations!