Hi,
Just thought my AOS update might help some on here who are in a similar position. My parents were asked by Immi (via their MA) to get their medicals and police checks done and for me to start my AOS application. This was approved yesterday and took just under 9wks from start to finish. My parents acknowledgement date is 22/04/15. They do not yet have a case officer.
Good luck, hopefully things will move quickly for us all! ?