This is our first time on the roller coaster, but maybe knowing DS' timeline will help....
Late November 2013: apply to USMMA
Mid December 2013: medical exam for DoDMERB
Early January 2014: exam sent to DoDMERB
Mid January: Exam Reviewed at DoDMERB and DQ letter sent the next day
February 2014: Receive congressional nom to USMMA
Mid February 2014: send medical records to DoDMERB to support request for medical waiver (USMMA) and then waiver is denied by USMMA
Late March 2014: Receive AROTC scholarship
Early April 2014: Accept AROTC scholarship
Mid April 2014: DQ letter sent (AROTC)
Late April 2014: Additional medical records and letter from coaches sent to DoDMERB in support of medical waiver request (AROTC)
We are still waiting on the waiver request for AROTC. Fingers crossed.
FWIW, it seems that DoDMERB was pretty quick at getting the initial letter out re: DQ or Qualified after the medical exam. The portal showed when the medical exam was reviewed, and the letter went out within 7 days of that date.
Good luck.