I caught a bass on my first ever cast on a wacky rig. The nothing for a couple years. It has already saved the day for me twice this year. Last time out, I was getting skunked while my buddy was only getting dinks on a minnow. They weren't chasing any food-postspawn blues. As a last resort, I tried the wacky-rigged Big Bite Trick Stick. I had nothing to lose. I caught 5 on it. and Lost a +/-5 pounder at the boat. Then I caught another 3 pounder on a Pop-R. Lesson learned...this won't be a last resort for me anymore.
But this was a large pond/watershed. You know there is a captive population of fish there and you have to find a way to catch them. In a major lake, they could just not be where you are.
BTW, I don't let it sit there 20 minutes. I hardly let it hit the bottom unless I know a fish is there. Cast it, let it sink on slack line, twitch a couple times and repeat in the next location. My buddy power fishes and I didn't have time to let it lay. But I was catching fish in spots he already cast to.