The German news magazine "Spiegel Online" now has more info about this as well:
http://www.spiegel.de/panorama/0,1518,539336,00.html
Some (translated) extracts:
Ttitle: 24-year-old controls Airbus during landing
"During the spectacular high wind landing attempt of an Airbus in Hamburg, the plane was controlled by the young (female) co-pilot. The dramatic go-around manoeuvre, which prevented a disaster, was then executed by the captain."
"Why pilot Oliver A. allowed his inexperienced colleague to do the approach during the storm 'Emma' is not clear."
"Lufthansa reaffirmed on Tuesday that the crew has acted correctly."