I may as well add my 2 cents.
First, TSandM has WAY too much time on her hands today it looks like. She's supposed to be taking care of patients not causing trouble on SB!
Second, I'm still trying to figure out what IS (and "who is") "DIR" -- a "holistic system" of diving -- a philosophy of diving -- a structured set of rules on diving -- what? (And yes, this IS a rhetorical question.)
Third, I really think TSandM's post is a continuation of a discussion we've been having for, oh, the last 12 months about "the value of DIR." She doesn't like my responses so, like any good person, continues to ask the question until she gets the answer she wants.
On to the question:
Can't answer the question until someone defines for me a "recreational" diver. IF, as I understand it to be, the PADI "Active" diver is someone who does 10 - 15 dives A YEAR, then it is my opinion the "DIR Program" would, in fact, be detrimental to that diver. THAT diver is, and will be, a "trust me" diver and should never go diving without the companionship (oversight?) of a DM or the like. PLEASE, let that diver have an air integrated computer to tell him how much air time he has left -- let that diver use the computer to tell him NOT to go too deep AND when he'd better start up. Do NOT let that diver try to plan the dive the "DIR Way" because, quite honestly, he won't be facile enough with the information/data to come up with the proper plan or be able to follow the plan.
Not to mention THAT diver will get horrendous cramps in his feet and legs if he actually tries to use Jets to do a frog kick instead of using his splits to "gracefully" flutter along. Can lights, light signals and hose routing? Fuggedaboutit.
So, IF the PADI "Active Diver" IS the "Recreational Diver" that is comtemplated by us all, please, don't confuse them with the facts and knowledge of the "holistic DIR philosophy."
OTOH, if you are talking about a truly active recreational diver, one that will be in the water a several times a month at least and who is willing to take the time to practice skills and such, then in my ever and always humble opinion, the "holistic DIR philosophy" (including the Hog rig) will have a lot to offer the diver. Improving one's "team" (buddy or partner) skills can't be negative, can it? Likewise assisting a diver in becoming more "situationally aware" can't have a downside, could it? And, helping a diver become a more aware diver -- aware of gas management, tides/currents, effects on the immediate environs (get those damn fins OFF the bottom) shouldn't have anything but positive upsides. BUT all of these are things that need to be practiced on a regular basis.
So, TSandM, I'm giving you the same answer to this question I gave the other day -- IT ALL DEPENDS ON YOUR DEFINITION OF A RECREATIONAL DIVER!!!