What proof? Because they work on hunting videos? If so, they were killing just as many turkeys using foam decoys as they are now with mounted ones. Sure they look more realistic , to us. A gobbler doesn't know if it's a mounted decoy or a foam decoy. The object anyway is not to see how many gobblers you can get to mount your decoy, but to get that gobbler into killing range, and a foam decoy will do that just as good as a mounted one. Seriously though, what proof are you talking about? I hope not justthe words of Eddie Salter, Alex Rutledge, or Will Primos.