Amazing that that problem with the ejection seats first came up 7 years ago.
We actually found out the details at the squadron level, at Whiting, when some Navy T-6 IP bubbas at Vance emailed the slide show to JO to JO- some presentation that the class desk at Wright-Patt had put together listing the failure rates of different lots of CADs that got tested. The worst lot had 6 out of 9 failing to fire at all (didn't even fizzle), which means the front seater would have had as high as a 44% chance of riding it in.
Personally, I never forgave the CNATRA safety department for keeping that a secret while the USAF AETC chain of command at least communicated the bad news to their IPs. (The OBOGS scandal/T-45 IP wildcat strike a few years later, after ~75 HAZREPs and mishap reports on physiological episodes but little action, vindicated my opinion...)