That page seems at odds with this one...
http://us.flyasiana.com/Global/US/en...rchWrd=&page=4
Though neither of them put the QS on ICN-SYD (your page also has both the 772 AND the A333 flying on SEA-ICN). The poster of that TR does mention that it was scheduled to be on his route, though.
Still, once I had jumped through those hoops, I was able to take a look at the seat map online and was pleased to discover that the 8th June flight to Seoul, and 9th June to Sydney were both scheduled to be Quadra Smartium seats.