That is not correct. The traffic guidelines say it should be at least 5 days. Also remember, these are technically recommendations,
but when it comes to after April 30th and waitlist, schools may have tendency for sooner rather then later, especially as it draws closer to
orientation.
https://www.aamc.org/download/364264/data/2014trafficrules.pdf (emphasis added)
Traffic Rules for Admissions: AAMC Recommendations for Medical School and
M.D.-Ph.D. Admission Officers
6) After April 30, each school or program implement school-specific procedures for
accepted applicants who, without adequate explanation, continue to hold one or
more places at other schools or programs. These procedures:
a. Each school or program should permit applicants:
i. A minimum of 5 business days to respond to an acceptance offer. This may be
reduced to a minimum of 2 business days within 30 days of the start of orientation
ii. Submit a statement of intent, a deposit, or both.