The key to fishing plastics on topwater is letting the fish fully get the bait in their mouth. I know its easy to get excited and set the hook the second you see a blowup. You need to let that fish bite, get back down in the water, and then fully suck it in. Then you can set the hook. Even then, you won't hookup with every fish.
Another thing to consider is the possible size of the fish hitting. Those 5" pop shadz are a big, bulky lure. Sure, any size bass will hit one, but if you're fishing it texas style, it's going to take a big fish to hit that thing and get it fully in its mouth in order for you to drive the hook home.