I mean dive from 7500m straight down all the way,and you at no time loss controllability,it does pitch down in relative terms but you still have good response on elevator main surface,and at no time is default trim pitching down in absolute term.
I can recover with 15% pitch up on elevator main surface from 940km/h TAS at 3000m(open-cockpit TAS gauge),way past mach 0.68,if it is truly modelled correctly,then it surely stretch my imagination a bit...
https://en.wikipedia.org/wiki/File:C...ibility010.png