The waiver process varies for candidate to candidate. It might take 6 months as in this case or it can take 3 weeks. Typically though it does become more backed up later into the year because ROTC only candidates will not be sent for their DoDMERB until they are offered a scholarship. That means right now the ones with DQ will be SA candidates.
Plus, DoDMERB just DQs. It is the commissioning source that waives. I.E. IF you apply to USAFA and AFROTC, both of them would have to waive the DQ since they are 2 different commissioning sources.