I have been wondering about this strange tail section torn off and went and took a look at a pretty recent water event - this one with a very successful outcome for everyone onboard. Also an A320.
Sorry, the pictures are small but I have links to highres pics at the end of the post.
Notice the similarity in the tail section. This is fron the transport of the recovered plane so no stabilizers...
The actual plane on the museum. Stabilizers are put back to place. Surprisingly similar damage as seen on AirAsia.
Some links to highres photos:
http://journeysbyjill.files.wordpres...2/img_0168.jpg
http://smithsonianscience.org/wordpr...light-1549.jpg
http://tinyurl.com/m978xrt
EDIT; Seems like the last picture won't show properly sometimes. I have saved it on my computer if someone is really really interested...
EDIT 2: Followed advice and used tinyurl.