Who cares? Just do the best you can do man.
There are a whole host of other factors that could have lead to his lack of selection including criminal record, medical record, poor LORs etc.
Yes, I would be surprised if someone with those ASTB scores didn't get picked up.
That being said, getting great ASTB scores does not mean you are going to rock flight school or vice versa. The ASTB tests basic mathematical and mechanical knowledge. It does not test one's dedication, willingness to work hard, study habits, or the ability to nod your head when everyone tells you that you suck at flying.
I remember the ASTB being really important to me when I applied. Looking back, I don't think the scores meant much.