OK, I didn't read the entire thread so I don't know what all was said. But from the way I saw it, the plane did not stay still, which meant that the plane was going faster than the treadmill. If the plane was standing still, it would not have taken off. But, since the guy flying the plane got it going faster than the treadmill, it moved forward, which caused air under the wings, which gave it lift. When they are able to get the plane to stay still on the treadmill, then it will not fly.
I have a feeling that this "myth" will create so much controversy that they will have to do it again. I thought they were suppose to keep the plane at the same speed as the treadmill, which means that it would be stationary. But that's not what they did.