Hey, I'm new here but signed up to say that I didn't hear back from them for well over a month. I called up their office in Canada and they said it was because they were going to need a chest X-ray for TB since I was in Taiwan for 4 months. They were super friendly over the phone and didn't seem to mind me bugging them.
That said, I'm currently on a layover in SFO on my way to Aus Best wishes on the visa!