And for that matter, any other Accident Investigators out there had experience with the French?
Not accident investigations per se, but I have filed a number of incident reports and MORs over the years for events that occurred in French airspace - mostly dangerous mis-communications and ATC actions around Paris CDG - and the airline found it virtually impossible to get a response out of the DGAC. They really do not like admitting that anything might be their fault - part of the culture. Watching the then-head of Airbus defending the A320 following Habsheim is a study in arrogance.