depends on lift vector
Dan
G onset rate is intense and thing thing we guard most against. 9G positive is physically tough to sustain even though latest generation jets can sustain for a long time. Some of our jets in the right configeration can do a limiter pull, Remember in an electric jet you pull and the computer decides what you get, and lay on 6 Gs per second. G suit cant keep up with that, you have to start straining before the pull.
Thrust vectoring gives you potential for higher G onset rate beyond 6. But even with a limiter pull you still only get a vote, the computer will ultimately decide based on "Cat Switch" Category of configuration.
Lift Vector up and your working against gods G ie gravity on top of what you generate with the lift vector.
Your body can handle an instantaneous G of 25 G for up to 10 seconds without blackout do to stored oxygen in the brain. Thats why folks didnt GLOC from a ballistic ejection seat, the G wasnt sustained. Problem is high onset rates set you up for a regime where you dont get grey out you just go from awake to asleep. Aerobatic aircraft can lay on a tremendous G onset rate comparable to top line fighters, they just can sustain it.