I don't see it hurting. I used a full strut decoy this weekend. Toms weren't even interested. The hens were more infatuated with my hen decoys. 2 of the hens stayed around and fought with the decoys for a couple of hours after all the others had left. Toms were more interested in the real thing moving around than the stationary decoys.
Where I see a real difference is when a single or a couple of Toms come in all alone.
" I don't hunt turkeys because I want to, I hunt turkeys because I have to."