Perhaps the problem with Australia is that it took Vatican II SERIOUSLY during the decade after Vatican II, promulgating study and implementation of the documents at every level.  

The U.S. Church, however, only did this in several pockets of our country, depending on the traditionalist or Vatican II predisposition of local bishops and pastors.  Therefore, most U.S. Catholics were ripe for the suppression of Vatican II implementation under Popes JPII and BXVI since they heard so little of the Second Vatican Council in the pews.
https://RiteBeyondRome.com