You are right for an HR perspective they love the military, but it isn't just the experience of the military, it is that companies like Boeing, Lockheed, Grumman, Pratt, etc., want them for the golden ticket. TS clearance.
Fliers, and maintenance officers are going to have TS clearance since they know classified info about the airframe. These companies work with the military and any employee that they have that will be connected with classified info will need a TS, especially if it has to do with engineering their next jet or tanker.
TS's costs tens of thousands of dollars, and last for 5 yrs. If he leaves and just had his TS clearance renewed, he takes that clearance with him. A TS clearance can take up to 6 months. Hence, if they can choose between the AF officer with TS clearance, who will start working day one, or the non-military applicant that will cost them 10K+, and sits on their hands for 6 months, or worse yet doesn't get clearance, they will take the military applicant. It makes fiscal sense for a business.
Anyway, back on topic.
Jwarren, I know you are concerned, but honestly, as long as he has a strong PFA, a cgpa over 3.0, and depending on the school it could be lower (i.e. MIT) he will get FT.
FWIW, when he takes his TBAS if he has flight hours, tell him to bring the log. They give extra points to the score based on how many flight hours.
I would also suggest for him to start talking to his cadre now, about AFIT. AFIT is the AF grad school at Wright Pat, they must compete for the spot, just like SFT and UPT. However, this is one area where he can do ED. ED is where they go to AFIT for a yr to get their masters, and than go to their follow on assignment. The commitment owed runs concurrent with the ROTC commitment, but companies that have been mentioned also recognize how competitive this is, and will vie for him.
The CC will assist him in explaining how to apply for AFIT or fellowships.
Good luck.