If it makes you feel any better, I've been chasing them with a bow since 1998 and still haven't brought one home.
As far as vocalization during the rut, they only seem to talk when they are comfortable and relaxed. Once there is any pressure they seem to get quiet, not that they won't respond by coming in quietly. I've never been in a spot where they bugle like crazy, like you see in videos, but have been around bugling bulls some. Cow calling, quietly and sparingly, has had better results for me, just haven't been able to get a shot off. Stick with it, your day will come, as will mine!