RR_NDB, I think we owe OC a vote of thanks for his reasoned challenge to my points.
Being forced to defend a concept requires both parties to explore their thoughts carefully and to develop them to a greater degree than if there were no challenge.
PIO or APC or whatever you wish to call it is a very interesting topic, and produces many surprises. I am pleased that others find it interesting too.
In the case of AF447, the initial roll oscillation stands out as a very strange thing. It will be interesting to see what BEA makes of it.