Thank you very much for your detailed and researched answer! It's pretty much what I suspected, although the phrase "kyousou" slipped my mind when I formulated my original question.
Thanks, too, for the pointer to the relevant pages in "Aikido Ichiro." I've gone and reread the chapter including the interview with Doshu and the Kodokan 9th dan practitioner -- it'd been a while since I've read the book. Good stuff in there, too.
I hope you can find the time to peruse these Forums every so often! Your participation om the future would be greatly appreciated.
I hope to meet you next May at the Aiki Expo...