I think I'll bow out of this discussion, not because it's not informative and interesting. It is, and I thank each and every one of the respondants for their civility and candor. However, I'm out because it simply does not apply to me. Before one responds with the shocked query, "Don't you have an interest in being a "better" diver?", let me add...
1. Seeking DIR training isn't really possible for me. As far as I know (I've looked) there isn't a DIR, GUE or UTA program within a four hours drive from my home. Considering the distance I would have to travel, the length of time I'd have to stay there, the cost of the course, and the expense of quite a bit of new gear, it's simply outside the realm of practicality.
2. I have absolutely NO plans to move past my current formal training (Tech, cave, or penetration diving, etc...)
3. None of my diving friends are so trained. As far as I know, I've never even been on the boat with another DIR diver, so my chances of being "insta-buddied" with one seem fairly remote. Since the attraction for the training seems to be a bonding between similarly trained brethren, being a "team of one" would be a bit silly.
And, before anyone asks...as a matter of fact I CAN hover motionless inches from the bottom. I spent three hour-plus dives doing just that in 10-15 feet of water photographing and videoing crayfish and pupfish and the like two weeks ago. I'm sure the training, were it available, would teach much more than that, of course. As I pointed out already, though...it's irrelevant since it isn't practical.
However, I do thank everyone for the great information and the quality of the discussion. Proud of y'all!