I think so, in that they're tunes written for group singing and have been passed down in a tradition. Unfortunately most of them are particularly bad as music, since the requirement for getting your songs written down has generally had more to do with devoutness than the ability to carry a tune in a bucket. John Wesley in particular has pissed prolifically in the fountain of religious music, and there's far too much pompous Victorian mock-ancient stuff full of "thou"s that's still going round.

Revival music on the other hand is quality stuff, proving that the devil doesn't necessarily have to have the best tunes. And the quality of that music is such that it's being passed on as folk music, and likely will be forever. Incidentally, check out Artisan for people still writing revival-style music (and doing it so well it hurts).

Graham.