Thanks Zept,
Do you think it's possible that you might find greater enjoyment in your diving if you were configured in such a mannor that facilitates proper horizontal trim, less drag, and greater streamlining? By pushing less water, you're efficiency in the water will increase, resulting in better air consumption. Would these things be desirable to an OW tropical diver?
Wouldn't having a good quality backup reg immediately accessible on a necklace under your chin and donating the primary reg (which you and your buddy knows works) be something desireable to all divers? Donating the primary reg is a very popular method of air sharing.
How about proper fitness and diving with safe divers? These things should be beneficial to all divers, I suspect?
How about simplicity? Wouldn't tropical OW divers benefit from the ultimate in simplicity and adaptability?
I'm glad you're a skeptic, but don't allow the attitude of a few cloud the merits of DIR.
Take care.
Mike
PS. Most DIRers don't go around calling others strokes. In fact the word stroke is more often brought up by non-DIRers.