So I did a test also, yesterday. I used film mode and had the Anafi really close in, about 3 feet high and within 10 feet of me. I selected 80%, and made a quick backward movement with the right stick. The drone reacted quickly, and when I let go it stopped quickly, with the little overshoot wiggle we are all used to. Then I set GR to one and did the same thing. The drone responded much more smoothly to both the initial stick movement and stopped with no wiggle when I let go from full back right stick. This would be ideal for slow, precise manual control very close to objects, so I'm going to set GR to one for that sort of manual filming that I do, and maybe 20% for other film work. There was no difference in the airspeed of either setting and I didn't test vertical flight. I expect the same behavior, though. I think you could mimic this smoother behavior by simply being slower with stick movements, which may mask the effect of the GR setting.