electric water pump???

I thought the purpose for one is to eliminate parasitic drag on the engine, for drag racers. The electric pump takes power from the battery, so is kind of a mild form of cheating, like adding a hybrid drive. Longer term, the battery is recharged by the alternator, and loses make the over-all load higher, making the engine less efficient. I see where it would aid water flow at idle though. I wouldn't want the reliability issues.