No, he hasn't (when that day comes, I'll cry my eyes out...)
His recovery after the surgery was ok, but he has pushed the season start forward a couple of times due to pain. But at his latest message on his website (27.11) he says that he's very well and is preparing for the German Nationals. This weekend, he'll compete in NRW Trophy (http://www.goldenskate.com/forum/showthread.php?t=25676). So our Stefan seems to do very well! I can't wait to see him at Euros!!