I emailed this week and this is what they said: "
Thank you for reaching out to the Office of Admissions. We appreciate your continued interest in Weill Cornell Medical College (WCMC). WCMC’s waitlist movement can last throughout the summer; as our wait list is not ranked, waitlisted applicants are re-reviewed when openings occur. We are unable to give specific times of when individual applicants will be re-reviewed. You may continue to send any updates or communications about the waitlist to this e-mail address. "
Maybe they'd be willing to provide more information over the phone? But it's hard to say.