Hi Liberty70,
I applied directly through the Airservices Australia website on the 22nd of Jan and got the email for online testing on the 15th of Feb so that is about 24 days. So I would wait about 4 weeks before worrying that you have not go to the next stage.
However as the others mentioned they seem to be progressing applications quickly once you pass the online testing; sending the email for telephone interview booking the next day. I just wish they could send the rejection letter the next day too instead of leaving people hanging and wondering.