Birth of the Blue Missile

I long ago decided to run an electric water pump, but the other day I took out the MP book on the small block and read that the standard water pump at cruising speed pumps 70GPM. The high flow electrics brag about moving 35GPM, what am I missing here? At Idle the elecrtic has a slightly better flow, but the moment you hit the gas the standard one leaves it behind.
Thoughts or corrections.
Andrew