If you are applying to the schools that offer interviews very early, plan to be on top of your application. It takes a lot of hard work to get AADSAS app off, supplemental app off, letters finished, money sent, and interview invite all before July 28th (or August for that matter). I applied in the earliest group, but my letters were late. My last letter was sent to AADSAS Aug 20th and some schools had not input it with my app till Oct. Be weary that often "processing" takes more time than you expect. Good luck!