The question how Shioda Kancho's terminology maps back to IS is an interesting and important one. But I find the question of whether his ability was passed on much more important.
I think most can agree that most Yoshinkan aikido is taught more as a jujutsu than as an "aiki"-do - especially at the lower ranks. Still, I have heard some speculation that the real stuff gets introduced at the higher dan levels. I have no idea whether that is true.
So my question is: does the current generation of Yoshinkan shihan exhibit any of Shioda's soft aiki power?
Would appreciate any insights into whether the following clips of these Yoshinkan Shihan demonstrate IS to any degree:
Focusing on 1:25 to 1:50
Focusing on 0:29, 1:00, and 1:30.