'Course he was unconscious at the time...
If he flew with the Thunderbirds there is not much doubt he pulled 9 g’s. It a unique capability of the f16 and part of the media ride. They even give a 9g pin out.
I was flying an F-16 once when the computer that is supposed to limit the g load to 9 decided to not work. I pulled over 10g’s that day. As far as I know, that’s the record!