Fair enough mate, I haven't done any autos recently, although I've done heaps to touchdown in the past from many different setups.
When doing maintenance test flying in Hueys we would get set up 1000 ft above the test altitude to enter auto to ensure everything was stable to note the Nr when passing through that altitude. It was part of the test flight schedule so I guess there's something in it taking perhaps that much height to get totally stable to the nth degree.
Having said that, starting from say 1000 AGL on a straight-in auto, you're certainly comfortably established in autorotation and waiting for flare height to come up after two or three hundred feet or so, so yeah, who knows.