Since the discussion on stall/spin is continuing, it would be useful to know if there is an answer to the following question. For the A320 is it known if there have been any tests, including wind tunnel tests during the design phase, that might indicate if the aircraft can be put into a deep stall condition, which in this case would be due to the THS itself stalled so that there is no longer elevator control effectiveness (since with a non-T-tail the mainplane would be unlikely to be able to shield the THS from normal airflow). In this case would this likely be unrecoverable even with significant height loss, or might there be unusual recovery techniques such as using thrust to provide airflow over the THS or possibly attempt to bank using residual aileron action, and then apply rudder to push the nose down enough to regain airflow across the mainplane?
This will likely stretch the limits of knowledge in an area beyond the normal flight envelope but it would be interesting to know if there is any knowledge of this extreme flight condition.
There is video of stall tests in flight for the 737 such as at
https://www.youtube.com/watch?v=a4V8W31YwTQ, and presumably analogous tests for the regime as the stall begins were also conducted by Airbus for each of the type it designed and built? There is also a nice lecture given jointly by Boeing and Airbus about stall testing at:
https://www.youtube.com/watch?v=HVt6LiDbLos