2for1 sale is my guess.
SQ have discounted J and F fares to Europe for travel next year.
NZ, VA, UA and DL all have discounted fares to the USA in J for travel next year.
These airlines have basically a 2for1 sale, with fares around $6000-$7000 each for a return in J!
QF are the only one without a real J sale, from all reports seats up the front are not filling still. So I am sure they would take $6000 each instead of $0 each at the moment to fill an empty seat up the front!
I am staying up til midnight to see if anything appears on the QF website, if not I'll jump on here first thing in the morning or get the newspaper.