Okay, so I have no idea what ROSI is lol. I did my undergrad at York, and before i got accepted i would read all these people getting accepted through ROSI and my admissions application page still said (and still does say) "under review". Im assuming now that I have a UofT student number ill be able to log into this ROSI page..havent had time to look at it yet though!
I also got this exact email at the end of march when i e-mailed her, only difference was that she let me know that there had not been any update on my application. That was March 25th, and my acceptance package had a date of "April 1st" on it when it came in two days ago. Hang in there!