Thalassamania:
What you fail to grasp (arrogant as it is for me to point it out

) is that the entire recreational diving world is an outgrowth of the Scientific Diving Community. We started it, we created it and like Dr. Frankenstien we lost control of it; and it has, in most of our opinions, run amuck. So I feel some resonsibility for trying to help put it right or at least for perserving the things that we know that have been forgotten because we used a brain from, "er ... Abbie Somebody."
What you (in your feigned arrogance) fail to grasp is that I couldn't care less.
Actually, I thought the first recreational cert agency was LA County, the first nationwide agency was YMCA, and the rest sprang from there. Of course, it's an open forum, and you're welcome to educate us on your perspective, but I really think that's a hijack suitable for a separate thread. Seriously. I think a cert agency tree / history thread would be very educational. Should I become a Y-certified instructor (as I plan to when my babies get a little older) I'd appreciate having that info.
I was trying to stay focused on the OP's question.
I know it's bad form to use an exception to define the rule, but allow me a little leeway for the purpose of illustration:
Let's assume a student who is, oh, I don't know, maybe a marathon runner, and, like myself, as you may remember from another thread, is negatively buoyant. So, loads of lower-body strength, minimal upper body strength, outstanding physical condition overall, but challenged by the 200 yard swim. Why should he have to take swim lessons in order to pass SparticalBrane's 1200-yard combined swim? Or even the 200 yard swim?
Yes, the marathoner is an exception, but I think the principle applies across the board.
I remain convinced, despite Walter's post, that extending the swim requirement meets any need that can't be better met by training that is applicable to SCUBA.
I say 'despite Walter's post,' because I am a big fan of the YMCA program. I was originally certified by PADI, but crossed over when I learned about YSCUBA, and have even PM'd Walter with questions regarding becoming a part-time Y instructor.
I know I said I wasn't going to commit any more time to this thread, but it just keeps sucking me in...