Trapped frozen pitot tube pressure would give an overspeed zooming to 380 so probably explains the idle power. Once stalled descending at 11,000 ft per minute the ias would rapidly decrease as the static pressure increased. So at 60 knots ias the stall warning quits so the FO's think they have recovered from the stall are in a deep stall. What a system design. It took a lot of their final minutes comforted by false information. Hopefully the BEA will tell us more of what we know they have learned but their brief preliminary report leaving out so much data they have puzzled me. Maybe they have to run it by the French attorneys first.