Electric water pump

I have a Meziere HD electric water pump on my 505" 675HP Big Block and it works great for cooling at the drag strip ( in between rounds with the motor shut off and the twin electric fans blowing ) ....but....not so much for street driving...I checked with Meziere Tech and they say their electric pump pumps LESS WATER than a stock belt driven pump at 2500, or more, RPM...so street driving with a lot of RPM driving over 2500 RPM the electric pump will pump (and cool) less than your regular belt driven OEM pump....and that is a fact.