Generally speaking when people talk about power fishing they are generally referring to big heavy and fast moving baits. While this explanation of taking deep running crank baits and heavy jigs or big 1 oz. spinner baits and moving them quickly over an area to cover a lot of ground does describe power fishing there are other ways. In fact you can move slowly, cover small areas and make a lot of casts to the same piece of cover and still be power fishing. Power fishing can have a lot of different meanings, the key is not speed or depth it's generally the thoroughness that you cover an area with some of these baits that really describes power fishing. Working a jig around a tree from all angles is also power fishing. Systematically covering a hump from all angles top to bottom, bottom to top and across the hump is also a way we power fish. Don't confuse power fishing with speed, this is an easy way to put it; sometimes to get the thorough completion of fishing an area, and methodically covering every little bit is a way to power fish.
Sometimes I take a target where I know a bass is hiding and throw at it multiple times until I get the result I want. When you know that a tree or stump is just ideal for a big bass to be hiding. Throwing at it multiple times with a heavy jig until you finally get that fish to bite can be an example of power fishing!
Lastly working several crank baits in the same generally area can also be a rewarding way to power fish. Going from a 6 foot deep crank bait to a 12 foot diver or a 20 foot diver, and having them all rigged on different rods and line sizes until you find the right combination is power fishing at its best. So remember you can be a successful power fisherman by just slowing down!