I have not heard back from Queen's yet either. BUT! I did speak to an advisor last week and they mentioned that they do rolling admissions. In my experience in speaking to people, the schools send out offers up until the very last minute (i.e. August) until all seats are filled. Just keep an eye out on OLSAS to make sure no messages are coming through and your documents are being received on time. They will not make a decision on your file until the entire application is complete, good luck!