I like Peter's the best.
I guess it comes down to what you train for and how true to yourself you are about that. And I totally agree that anyone, including myself can say what woulda, shoulda, coulda happened after the fact and not being there. The only thing I made indications to were primal untrained instincts of the human animal towards survival even when in a semi conscious state, which I guess are not as common as I might think.
Having been in a very similar one though, I know there are options, both within and outside of Aikido to survive that incident, taking initiative is key. But then again I don't expect that to apply to everyone else either, since folks train for many different reasons. As far as 8th Dans being the only capable Aikidoka to handle an unarmed situation such as this, well I don't agree with that at all, but then again, just my opinion. Like I said, it depends on your reasons for training.
Just my opinion. I reserve the right to be wrong.