If you don't mind, what do the Sokaku Takeda and aikikai opening pages say? The aikikai opening images seem to infer the surprise K.Ueshiba had at his fathers praise. That seems an odd thing to focus on, doesn't it?
The Takeda one says "Sugoi!".
You got the Aikikai one right. This is a story that Kisshomaru used to tell himself, which I guess is why it's in there - maybe a kind of vindication of his efforts post-war?