I mean... Traditional cars have to burn the gas and convert it to kinetic energy before it even get to the wheels.
The electric motor just takes the electrons to power without the need for a transmission. In addition, the speed can also be controlled instantly by varying the frequency of the AC power.
But since you asked for a source:
"advantages of powertrain solutions with electric motors are faster response time (order of milliseconds) and possibility of dual direct control either by speed or torque, increasing the flexibility of the control of pitch-plane vehicle dynamics [5]."
Do you have a source on this? I'm curious to read more as I thought modern AWD systems were pretty advanced.