I am also an applicant to the MA program at CU, and was told I would have my decision before March 15th. In the past, they have notified the Masters class via postal mail, so I wouldn't be worried if you have not received any notification so far. I would assume they will send the notifications out some time this week, if they expect it to arrive next week. Clearly, this knowledge does not stop me from obsessively checking my account/email/mailbox in the meantime lol.