If this is true now it is an anomaly. Also consider, he was talking about guys ordered in from the fleet. I was talking about prior service vets that applied as a civilian through a recruiter. My personal experience down at AOCS (a much harder program) was just the opposite. I didn't see a single prior DOR, including at least five ordered in from the fleet.
From what I saw at AOCS (much harder program.....amen), it has more to do with paygrade than rank interms of DORs and priors.
The ones E-1 to E-3 and E-6 and above did fine. The E-4 and E-5 group DOR'd at a much higher rate. We had several from all three groups in my class, including a Senior Chief.
E-1 to E-3: "I'm used to getting yelled at.......no big deal"
E-6 and above: "This is just bullshit harassment package and it'll be over in a few short weeks. It's worth it in the long term to stick it out and finish."
E-4 to E-5: "This is just bullshit harassment package. I've been in too long (5 years?)to put up with this crap."
All anecdotal evidence, but just my perspective. YMMV.
If anybody knows best on this, it's Wink.