I think bass are a "schooling" type fish which means running-and-gunning doesn't seem like it would be productives. Spinnerbaits, crankbaits, jerkbaits and any reaction-bite lure seems to change your mind about that though. If you are sitting in a spot and fishing a pieces of structure for 20 minutes and catching only a few fish, running-and-gunning might be more productive when it comes to numbers of fish.
IMHO, I think running-and-gunning it produces on average, smaller fish. I have caught more "big" fish on very slow presentations while spot fishing than running and gunning a spinnerbait or crank. I do not do just one of these techniques because some days call for finess fishing and the next might call for running-and-gunning. You have to let the conditions and fish tell you what to do. JMO