I really don't think there will be 3 different gear ratios. For several reasons (torque vectoring among them) it makes sense for two of the motors to be independently driving each rear wheel. With that setup you really, really don't want different gear ratios. The front motor can have a different gear ratio, but the rear motors will have a common gear ratio. It's OK because you now have doubled the (lower) output power at the high RPMS because you have two motors. Despite what loger keeps saying, the SRPM motors still have back EMF and it still reduces the current (and thus power) at higher RPMS. However, with 3 motors, the battery is the limiting factor for the total peak power that can be delivered. At higher RPM's they don't have the voltage to drive motor current to one motor, but you can drive both motors with whatever they can take. So they are actually forced to broaden the (total wheel) power curve because they don't have sufficient battery current (in a 100kWh battery) to drive all three motors simultaneously at the motor's native peak power output point. So the software that shares this power among the motors will cause the total power curve to be very flat across a long range of speeds, including the high speeds of Nürburgring.