for what its worth, i went ahead and installed the springs, and was not able to record any discernible difference after a week of driving with my miles/kwh reading. The clips do install super simply on the front brakes though. The front brakes also have a small spring built into the pad holder that might push the pads back also, not quite as effectively though, but the rear ones are a bit tight so i only installed a single clip there, not two.
here is what it looks like with the clips on the front pads, the pads should still be able to wiggle around and not feel bound up by the clip in any way.
here is the rear single clip installed, i did also modify and cut the last quarter inch bend off of them or else they didnt want to fit very well.
got the tires rotated and brakes inspected/cleaned/pins lubricated though, so this experiment didnt take much extra effort