Im not sure when the OMS-III's took their exam. I do have a friend that currently attends UIWSOM that said the administration said they performed well. This was told to me a couple of months ago however, and Im not sure they would have actually had the information to say that-- so this is all hear-say. What I have looked up is the examination dates with their respective score releases. If they're not particularly forthcoming about scores early on it may (or may not be) a bad sign. I have attached the release date schedule that I screenshotted off the national board website which can be found with this link:
Score Release Dates — NBOME
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If you've been given an offer I would think you have full rights to inquire about updates with their program's scores. I would shoot them an email or phone call. And if you do, update us if you can! I only just interviewed and have not been given an offer so I am waiting before I get hasty with emails/ phone calls.