Hi,
Yes.
That´s one benefit of differential signalling. The power through the dataline is independent of high or low state.
Thus the driver VCC/GND current is constant. (Only giltches during switching, but these are compensated by the VCC capacitor).
Therefore there is no significant change in GND supply current. All the signal current, DC as well as AC is constant through the two signal lines.
In opposite with single ended signalling: The GND current changes with signal states. So in all impedance calculations you have to take care about GND wiring.
This makes calculations difficult, and the signal quality worse.
Klaus