Regarding a time frame from medicals done and documents sent in, in our case it was 3 weeks for our visa to be granted. We recieved notification by email and then a week later our passports returned with the visa. It was an amazing moment and such a relief, I totally understand how frustrating the waiting becomes. I am sure it will not be long for you and in the meantime try to focus on seeing friends and family, enjoying precious time with them because you will treasure these moments when you are eventually livin in OZ. You are doing the right thing, we have been here since Oct 2010 and have no desire to return back to South Yorkshire.