Sorry for misunderstanding you, Bruce. Do consider John's Baptism to be an OT ordinance, a Christian baptism, or neither?
Ken,
I don't think John was doing something that was so "out there," something not fairly readily grasped in connection with the biblical religion the people professed.
But I also think that John was opening the door to the NT, preparing the way; so I think his function is as a hinge. So, I don't see his rite as wholly the one or the other. It partakes of both ages.