Delay.
"The statement also says the youth's home was searched in November 2012. ...the most high-profile Anonymous attack in Australia during 2012 saw the release of customer records belonging to telco AAPT in August."
That would seem to be a fairly long time between the search and this announcement. I think that it would be reasonable to assume that the delay could be defined as the interval of time between the moment that they convinced the kid to roll on his comrades (which probably happened as soon as he and his parents saw the search warrant) and the conclusion of the ensuing operation in which he helped authorities identify and develop cases against his aforementioned comrades.