I too received the email. Feel a bit reassured. Here's the extract:
Greetings from the Yale School of Management! It has been a little while since the Round 1 application deadline, so we wanted to touch base to let you know where things stand in the round and what to expect between now and the mid-December decision notification date.
We are still very much in the midst of reviewing applications. At this point, although we have sent out the majority of our interview invitations, there are still a number of interview spaces left for the round and we will continue to send out invitations as we review applications.
In terms of releasing decisions, our decision notification date is December 15 -- several weeks away. We realize that waiting to hear from us is a difficult thing, especially since there is nothing more for you to do in terms of your end of the process. Rest assured that we are busily reviewing applications on our end. We truly appreciate your patience as we continue to do so.
As always, if you have any questions, do not hesitate to let us know.
Best regards,
Yale School of Management
Admissions Office