Hi DD!
First, please let me say that I wasn't directing any of my comments at you, they were more general. You're one of my favorite posters on this board and I know you always have the best interests of everyone in mind. Keep up the GOOD work!
My "read" on the experience of these guys was that they were commercial divers starting to do recreational dives as well. "Deep" air for commercial guys is often is 160 to 180 FT, so when Bill made the comments concerning "narcosis," I knew where he was coming from. The original "question" about nitrox indicated to me that they were probably inexperienced using nitrox as a breathing gas, instead of air or heliox, the more common breathing gases for commercial operations. When you do commercial work on air, you very quickly realize what narcosis is, and more importantly what it ISN'T. My comment concerning the pervasiveness of "narcosis opinions" on this board - and now apparently "oxygen narcosis" as well - was directed at much of the misinformation presented by people who really don't know what they are talking about but think they do.
On top of that, you really need to visit the training facility at the Ocean Corp to appreciate the level of preparation these guys have gone through to get where they are. It's one of the top - if not THE top - commercial training facilities in the world. Additionally, the Ocean Corp is a prime contractor for much O&G, government and recovery work world wide.
So, yeah, I take them at their word...