IMO JW nailed it, I blamed coyotes for the lack of gobbling here in wv for years, went to ky where coyotes are thick, they gobbled their heads off. When I was a kid, fall hunting was a big deal, now no-one does it. and any experienced turkey hunter knows a gobbler don't make much noise with a hen in his vision, yeah if he turns his back on the hen during his display he may shock gobble at hen noise but soon as he turns around he sees the hen again he clams up.
Now if hens get so populated that he can see a hen from the time he opens his eyes on the limb, till he flys back up, he don't hafta gobble. my opinion, worth what it cost ya.
RR