I don't claim to be an expert on Ueshiba by any means, but from reading books by 2 authors Suenaka and Tohei, both of whom were close to Ueshiba. Say that they never saw him do alot of those tricks.
Tohei states that many of the concepts that Ueshiba talked about were heavily influenced by his religious beliefs and that Tohei learned the most when he watched what Ueshiba did instead of his explanation for it.
Suenaka says that while Ueshiba did amazing things as a martial artist he never once saw him disappear or do anything else mystical or superhuman.
I've never read an account by an actual close student of Ueshiba's that spent alot of time with him say anything like that, it's usually authors like John Stevens who heard it from someone who heard it from someone etc. that the stories are told.