To the OP it depends on your department. I received the same email this passed Friday to check on March 23 at 8:00 am. Personally, I am not too optimistic since it seems that last year for History (my program of choice) there were like 6 rejections on the 24th of March. I have not heard a peep from the history dept, and the only saving grace for my heart is that this year the application deadline was 45 days later than last year. My head knows the answer even though my soul doesn't. Sorry to be that guy. This whole process has turned me from a glass half-full into a half-emty type person. Enough about me though, for you, I would gauge how they deal with rejections from others in your department since it seems that for other programs this type of email can be a good thing. Good luck!