
Oh boy.
First, he also says he is at 50 degrees AoA. Subtract that from the 135 degrees and it drops to a transient turn rate of 28+ degrees per second. Nothing to sneeze at. Due to where that maneuver is in the demo we can also assume that is ~50% fuel remaining. We don't know G involved, but from what I have seen even 9G aircraft don't go over ~7G in the routine.
And watch the video, the nose rakes very quickly (~3s) and then seems to stabilize before he goes vertical, this is holding the nose position while AoA decreases, i.e. flight path continues to change.