If they don't consider history as a minor, they should refuse to grant clearances to anyone under 25 or 28.
I also seem to recall being granted S, TS, TS/SCI, etc. is a lot easier/faster if you're in the military than if you're a contractor. Different queue, different investigators, and higher presumed loyalty to the US. (i.e. you were willing to roll the dice and potentially be stuck as a cook for 4-8 years, which a spy might not be willing to do)