You have a great DS to step away, but I would have told him to go for it. Do you know how many twins are at the SAs? Fencer's DS's are twins and they both went the same yr. It is not as an uncommon as you may think.
~~~ My favorite memory occurred @4 or 5 yrs ago and a poster was trash talking BCT regarding how easy it would be for him, so bring it on. Lo and behold cadets got on the thread and started to give him a wake up call. He still held ground, believing this site was truly anonymous, which in a way it is. He gave way when one of the cadets chimed in and said:
How many Asian twins from NY do you think we will have come I-Day?
His poor identical twin brother was not a poster here, and now all we could do was tell him to be kind and have his twin report wearing a t-shirt saying IT WASN'T ME!
Your DS1 may want to visit a recruiter this winter break if he is a jr. in college. Our friend's DS was like your child. He toyed with applying for the AFA and AFROTC as a sr. in hs. He opted not to at that time. He majored in ME, and as a jr. he decided he really wanted to fly in the AF. He started his paperwork @ Feb., and by Aug. of his rising sr. yr. he had been given an OCS slot. He is now at Pcola awaiting UNT.
OCS is a great option, especially this far down the academic pike. SA commissioning does open doors in the beginning, but remember if you look at the long term career, 50% of flag officers are not SA grads. Most notably, Gen Powell.