The board may have not reviewed his file to see how competitive it is. Until this happens, the academy will not send DODMERB a request to schedule a physical. Don't look at when your son's physical is scheduled as some short of indication of what his chances are. He might just be at the bottom of a very large pile.
Yes, I completed my application last week and about 2 days later the request to dodmerb was sent. I already had a profile with dodmerb from my other academy applications, so I could track progress online.
DD will submit her completed CGA app this week but is 90% through her apps for the other SA and she was notified for DODmerb, taken exams, remedial request submitted/reviewed and cleared all in two weeks time. It is my understanding that once DD is deemed a competitive candidate for USCGA they will request her DODmerb and since she is already cleared will not have to take another exam. This was much faster then she had anticipated. Her remedial was a straight forward clearance for a concussion she had 3 years ago and we had all the medical clearances readily available. Good luck to your DS in the process.