20 years ago in our part of Illinois there were NO turkeys. I didn't see or hear a turkey for a decade. Now we've got a robust population and we consistently have success. This isn't a highly pressured area though. So I don't think they're being called to a whole lot. I've seen no change in their behavior over the past decade of hunting them hard. Some days they cooperate and some days they don't.
Not sure what part of IL your from. But I can't remember the last time I called in a hot gobbler that would gobble back to me as I called it in!
Two weeks ago for youth season I "called in a hen" for my son, hoping a Tom was right behind her. Nope.
But they gobble their heads off in the roost but once they hit the ground they shut up.
Now I feel like I have to hunt them like deer, just sit and wait. I'll blind call every 15-30 min. Every bird we've gotten shots off of has come in silent lately.
Frustrating.