I think it’s more about selectively breeding out the more aggressive/gobbling behavior through hunting. I think they can learn, and they certainly respond to predatory pressure, but certainly don’t pass it on between generations so “smarter” doesn’t really describe it accurately.I don’t think they’re “harder” to kill or any smarter. I think hunters have gotten less patient and have unrealistic expectations. Too many 15 minute hunting infomercials have warped our view of reality. I’ve hunted twice and killed two birds. One was vocal and one was not. Both took most of a day and some patience to kill. Here in SC we had a mid March opener and 5 bird limit. Those early birds were aggressive and easy to kill. Too easy, any idiot could kill a turkey, that’s the reason numbers are down. A lay down hen and half strut jake decoy made for a lot of quick kills and turkey hunting gurus. Now the season is two weeks later in the breeding cycle and the birds don’t come running in to die. They haven’t gotten magically gotten smarter… it’s still the same turkey as it always was. Its just not as easy in mid April as it is in mid March.
Not saying this is the case at all, but so many people say it took X hours to kill a bird when it very likely could have been a totally different gobbler that came in. Hard to single out a turkey and definitively say that it was superb skill that carried the day. Not saying it doesn’t happen, because it does, but I often see this position taken with reckless certainty.