The crew obviously didn't just fly through a CB. Every crew finds their own way around them. No evidence of any major turbulence is reported in the BEA report. They iced up as had many Airbuses prior to this event. All indications are they lost airspeed indications and for some reason pulled back on the side stick until they went into a deep stall. No reports of severe turbulence or vertical drafts. I think it best to wait for the report rather than add personal concepts of what might have happened. The BEA report has nothing to report of any significant turbulence.