From my experience in dealing with NROTC from a DoDMERB standpoint, and knowing when they dump the applicants into the DoDMERB system (they will only dump names into the DoDMERB system when scholarships are granted), the NROTC scholarship board meets several times throughout the year. If my memory serves me right (and it seems to be getting a little weak at times) there were dumps in Oct, Jan, Mar (the big one usually), Apr, May, with a few more in Jun, Jul.
Now I could be way off, but NROTC usually put at least a hundred names in the system at a time, and that was something that definitely caught my attention. It could have been a couple of weeks between the time NROTC sent the letter stating the scholarship was granted and the time they put the applicant into the DoDMERB system. But I know there were times that the applicant was placed into the DoDMERB system before they got the letter from NROTC. So if you see NROTC in the DoDMERB system for your child the chances are VERY good that the scholarship was granted (I'm not going to say definitely because mistakes happen and policies change!).