I totally understand- the waiting game is awful! As far as I know it's still pretty early on, so nothing to worry about yet if you haven't heard back. The best clue I've found as to what the timeline will be like is this forum: http://thegradcafe.com/survey/index.php?q=audiology&t=a&o=&p=1
If you go back to February of last year, you can see when exactly people started hearing from certain schools. People have also started updating for this year too. Hope this is helpful/ gives you some peace of mind. Good luck!