They told us at the welcome session that the adcom meets around now (maybe have met already) and some acceptances will go out as early as the
end of December. The rate at which these letters go out will be conservative, to allow them to accurately tally the matriculation numbers. They're trying really hard to keep the total matriculants to 300, meaning they plan to wait on confirmed matriculants before sending out more acceptances throughout the spring. So I would guess that borderline applicants will have to wait a while. Hope that helps and good luck!