Whoa, you're right! He referenced it neither by 7-character short hash nor by full hash, and I didn't think to check intermediate hash lengths. I've updated the post to reference that email.
>Anyway, I'd suggest you try to limit octopus merges to ~15 parents or less to make the visualization tools not go crazy. Maybe aim for just 10 or so in most cases.
I'll file this under "problems I'm glad I don't have".