I have to admit, when the 5" Thump Grub came out, top-water fishing was not even remotely on my mind as a method to employ this new plastic. Suddenly this morning it just hit me that I needed to give this a try, so I got some weighted and weightless hooks rigged and was on my way to the water. It didn't take me long to determine weightless was definitely the way to go... the 5 incher did very well scootin' through the scum. Because of the narrow nose, it danced through arrowheads, lily pads, milfoil, eel-grass and rarely brought any weeds back to the boat. And good numbers of fish were striking it, but getting them to hang on was another story... oh well, that's kinda typical when fishing after a mayfly hatch.
For anyone that has bought this mold and has not considered using it as a top-water lure, I would definitely urge you to do so... not only does it sashay through the slop, but it can be buzzed in open water with a nice solid gurgle, and it can be waked below the surface. I can confidently say it will be a top-water staple in my hands, partly because of its performance and partly because it has a different profile than a frog (which might be a difference maker on some occasions).
Next time out, I think I'm going to try flipping it.