When I called the woman I spoke to warned not to expect the waitlist to move until summer. Since the response deadline is 4/10, I'm not sure if this means they traditionally get a lot of people who accept (since there's no deposit) and then decline closer to the start of term, or if very few people have been declining this year compared to previous years, or if she saw something on my profile that screamed "low priority candidate", or if she just wanted to save me the stress of checking my e-mail every 10 minutes, or if the admissions committee isn't planning to meet to review the waitlist until spring semester ends, or something else.
She also said they'd likely make offers via e-mail, so make sure they have your correct e-mail!
