In reply to Gary 4nill:
Plenty of discussions online between professionals involved in this area, and for many months before this particular incident. However, all the stuff I've been reading is in closed forums.
It's a bit of a catch 22.
If you are in the climbing industry and really need to know about this, you already will. If not, you should probably be referring to a technical advisor who does.
Sorry I can't help, but this might explain why you've not found much online.