I did call them yesterday and the girl had no idea what I was talking about. She had no idea what the significance of May 1st was...
However, I have since read a piece that came from the ADEA that states that the schools will report the names of those that are holding spots on May 1st. (
http://www.adea.org/dental_education_pathways/Documents/ADEA_AADSAS_PASS_SPRING_09.pdf).
Here's an excerpt from last years newsletter:
As a reminder, the May 1 Traffic Rule states:
Dental schools participating in AADSAS will report to AADSAS by
May 1 the names and identification numbers of candidates who
have paid a deposit and/or hold a position in their entering class.
After May 5, AADSAS will report to each institution the names of
candidates in their entering class who are holding acceptance(s)
at additional institutions. Dental schools will have the option of
rescinding an offer of admission to candidates who have paid
deposits and are holding positions at multiple institutions. Dental
schools with candidates holding multiple positions will give
such candidates a minimum fifteen-day notice if they choose to
withdraw them from the entering class.