An aside from the present purpose of this thread.
When you ask what a certain agency says about a topic, it is nice when an experienced diver relays some information that pertains to actual DIVING. A carbon copy of what the text says is not information from an experienced diver, it is the party line. Said diver is some one who has completed a fair share of dives in a variety of environments and situations. I should think that he could converse civily about HIS choice of gear and why HE dives it. A simple, I dive IANTD, is not an answer. No matter what you say, there will be situations where your present gear configuration is not optimal. If you say different, you are not trying new things or you are close minded. Can't we disscuss opinions on trainning and gear config without feeling personaly attacked? Pasionate yes but not offended! I'll tell you what I dive. Tearing it apart and critisizing my gear will either solidify my beliefs in my config or allow me to change and try a possiblys better set up. Thats the way I see it. Nobody tells me how to dive, just suggests good ideas on how to dive.
Now
With regard to dual bladders, has anyone diving a single bladder had a REAL failure where they had to abort the dive? With drysuit or without? How did it go?