Over the course of the year, 600 people are interviewed, and roughly 300 acceptances are given out. Then they pull from the waitlist. You can figure out the odds based on that.
From my experience, the chances are very much in your favor!!! I was in that situation, interviewed in Oct. and was accepted less than 2 weeks later. At the interview, the guides told us that almost everyone who was interviewing this early in the game (i.e. pre-secondary interview invite) was likely to get in... if not immediately, then probably from the waitlist.