In several recent threads this has been discussed with numerous examples. The experience seems to be two-fold: often they post within 3-5 days of the flights, sometimes within couple of weeks. But there's an equal number of examples of DSC's not posting at all within the allowed time period but the customer needing to chase up Qantas FF customer service to get them added to the account.
To which camp which particular flight ends up in seems to be magic with no way of predicting it. You just need to sit back, relax with a drink of your choice and wait...