Good point, Terry!!!
I have a bunch of old Bear recurves, a Howard Hill "Mountain Man" longbow, a custom hybrid longbow. None of them have quivers on them, and I shoot them just fine!! (Ok, except the Hill, can't seem to hit a bull in the a$$ with it)
I have 2 hunting bows, A 1969 Bear Grizzly with an old double spring arm Bear quiver, and my Bear Kodiak T/D with a Selway/Bear "Grayling" side mount quiver. These quivers stay on these bows, and always will. I like a bow quiver on my hunting bow, and I always have. My very first hunting bow, was a 50# Bear Alaskan with a 4 arrow Bear tape on bow quiver.
I think the real problem many have (as I've said before) Is the switching back and forth between quiver/no quiver, with the same bow... Basicly, it seems to shoot better one way, than the other.