I called them today, and they told me the same thing: that its going to be early next week. I also asked whether people who haven't received admissions yet were rejections, and she said she couldn't tell me anything about that. So I don't know what to make of that.
Although from what they said when I called earlier in the week, the reason the results haven't been posted online is because they are still waiting for an official list of admissions from the EECS faculty, so in that sense there could still be hope.
Perhaps the people who have already been admitted are those who have an "in" with a professor already, maybe because they were an undergrad at MIT or had some other form of contact with a professor. Maybe they are now still sorting out who else to admit other than the ones they knew from the start they wanted... Just a thought