Perth - Australia's tardy over-rate

Even after extending play by half an hour on the first day at Perth, the Australians were six overs short. If I am not mistaken, the play will start early tomorrow to compensate it. Since this is so un-Australian like, it makes one suspect it as a ploy.

 

If you remember, they were tardy at the SCG too. However, despite batting for a fair amount of time on the last day, the Australians still had 70 overs to bowl at the Indians.

 

Don't you think the same scenario is being repeated?  I see this as a deliberate ploy by the Australians to dictate the number of overs they have to face on the last day.