Does anyone here have any real stories of a modern day Aikido instructor doing what O'sensei was able to do?
What, specifically, do you mean by "what O'sensei was able to do?"
I was born after Morihei sensei's death, so I have no firsthand experience with how he felt. Only stories. However, I'm iconoclastic (read: prick) enough not to believe any stories until I prove them myself. Unfortunately, since he's gone... stories are just stories.
I will say without reservation, though, that I never felt anyone in Japan do the things that my teachers and seniors here can do.