Frog fishing is my go-to bait in the summer on Guntersville. I would venture to say that half my summer/fall catches are on a frog. Color rarely seems to matter. In dispersed grass, I opt for a kicking plastic frog. In thick grass, I throw a snag proof, though the number and quality of hits determines if I swap to a Spro.
If nothing else is working during the summer, you can coax bites from a frog...even if that means landing it on their head. It is a great search tool, considering the range you can throw it, the rate of retrieval, and realtive snag proof abilities.
Catching frog fish is less a function of form and ability, and more a function of equipment. If you aren't using the right rod, reel, line....then you can't afford to let the fish eat the frog. Now, you do have to learn to wait on the fish. In fact, it is better that you spend more time looking for your next cast than to watch the frog. So, when it comes to equipment, if you want to be serious on your froggin', get you a dedicated frog rod, a fast ratio reel, and 50-65 pound braid.
Frog fishing isn't a whimsical method. If you dedicate yourself to it, you can catch REAL monsters. I have a couple of 9s and more 5s that you can shake a frog rod at. All in the last year.