Almost 20% of the pax suffered bleeding as a result of a slow depressurisation to a mere 12-14,000 feet or so? Really?
Sounds highly unlikely to me, bleeding is surely pretty unusual even in a fast depressurisation?
I wonder if the word "bleed" got carried over from the pneumatics to the respiratory system by an over-zealous journalist?
I can well imagine the flight-deck's ears will be bleeding after they've listened to what their Chief Pilot has to say!