(a)The following extract is from "Slater & Gordon must wait on Quindell", The Australian , 3 July, 2015, Kylar Loussikian

The chances that the release of Quindell's accounts could quickly clear the air for embattled law firm Slater & Gordon, which acquired a significant part of the British company in March, have diminished after sources close to Quindell said the release of accounts shouldn't be expected "any time soon". Quindell, which sold its professional services division (PSD) to Slater & Gordon for $1.23 billion, was to have lodged its 2014 accounts and its restated accounts for the 2013 calendar year with the London Stock Exchange's junior Alternative Investment Market by the end of June. Quindell's accounts, audited by KPMG, were reviewed by PricewaterhouseCoopers, which earlier confirmed revenue recognition and deferred acquisition costs were "at the aggressive end of acceptable practice".

Required

Using the article above explain what PricewaterhouseCoopers might mean when they say Quindell's revenue recognition practices were "at the aggressive end of acceptable practice".