They were pretty clear about not wanting to give bad news over the phone. I think that those of us who didn't hear back probably didn't get in, and the "decisions will be released later this week/next week" is kind of like "your snailmail rejection letter will get there soon".
Also, they said that acceptances are email and snailmail, not email or snailmail. This means those of you who received an email decision will receive confirmation via snailmail, not that those of us who didn't may receive first notice via snailmail. We can argue the interpretation, but it seems silly to accept some via snailmail only. The labor cost of having someone include a few more emails in their mass mailer is tiny compared to the cost of stamp, ink, paper, envelope and labor.