Woa people, what happened to 'a friendly board'?
Heather, I second JP. There is, unfortunately, not enough good data available regarding accidents and fatalities ... not even numbers. While most of the accidents make it into public eventually, the number of Rebreather divers, dives and hours of diving doesn't. Most manufacturers guard their production numbers closely, plus there are quite a lot of ex-mil units out there being used.
The same is probably true for 'technical diving' using OC equipment.
The BSAC annual report on accidents does list RBs separately, but I don't remember it listing technical dives. The link to it is somewhere here in one of the forums, worth having a look at.
So unfortunately no information for intelligent rebuttal.

Only bright spot here is that there is no information for
intelligent attack in the first place.
