I don't know anything about Western's wait list - I wasn't offered a wait list position at Western!
This is the email from Sue:
Thanks for your message and I’m pleased that you will stay on our wait list. And, as you can imagine there are no guarantees when a spot will come up. Our 12 Audiology positions are currently full, so it would need one of those students to drop out for whatever reason. We just never know in any given year. If you have other offers pending I would certainly be inclined to take them.
We are very pleased that UBC is your top choice, and you would be willing to make the move to Vancouver to join us if admitted.