Lking, I had my doghouse brushed in this past spring. called up a hen, and she didn' t pay my decoy any attention at all. all she was interested in was that dang blind. she putted and walked all around it very curious. I beleive if I' d been in a wide openin there' s no way that hen would have stayed there as long as she did.
I think it depends on the turkeys your huntin. private land turkeys that are seldome hunted, I don' t beleive would be as spooked of the blind as would be turkeys on public land or land that' s hunted a lot.

now, I called up a big tom about 2:00 one evenin, and I was in an old home made blind that I had set up 2 weeks before season opened. he was not a bit spooked of that blind, because he was used to seein it there ever day.

I' m not convinced that a big smart tom will not pay a pop up blind any attention, even if it' s brushed in. I' ll beleive it when I see it.