I am glad to find this post. I am trying to tune pressure advance/acceleration/jerk and experimentally I also see that high jerk (like 30, so high that I did not expect my printer to handle it) and low accelerations work best.
My bowden is around 70cm, I print with PETG and use pressure advance of 2.1.
I don't understand the mechanics. Probably, with high pressure advance things stop being Newtonian and become relativistic.