Read my thread :
http://www.flyertalk.com/forum/showthread.php?t=828122
You may assign 22H where I was sitting today. The ageing MD-11, has the emergency exit seats at row 41.
The premium cabin where 22H is, is blocked but if you hold an Oneworld elite card, AY will unblock it for you as they did for me.
You can see that many people wants to sit at 22H. The seat cushion is quite deflated!