And it's not just the odd teachers (although I'm sure some people think that I'm pretty odd) - the entire process of modern ukemi training conditions the bodies of both uke and nage to believe that something that is not happening is actually happening.
In this light, the numerous statements of the old-timers that ukemi taught may take on a whole new light.
My take on what Ellis presented is that the uke experiences are most likely accounted for by what you and Dan are referring to. The other stuff, who knows... In many ways, it is a straw horse. It does not really change the pursuit of understanding and learning IP/Aiki. If there was that supernatural component, then that will become self-evident over time as we pursue the current path of learning. Who was it who said "you don't know, what you don't know" ?