so if you trim it up when not having power the airplane itself will keep lowest possible flying speed until it hits the ground (or water)
They kept a bit more speed than that until close to the water. I doubt you could round out properly if you let it get that slow before flaring - without power, of course. I haven't flown the airplane in almost three years myself.
I'm sure people are doing this in recurrent simulator and will soon be giving us some "data".
