At my Nov 10 interview they said the committee meets the following Friday to review the past week's applicants in the interview.
So my group was decided upon on Nov 17.
They also said that since Nov 24 is a holiday, the Nov 17 people were decided upon on Dec 1 and hopefully in time to mail out acceptances. So it may very well be the case that Nov 17 people were NOT included in the first round. Dec 1 probably weren't either.