I guess he was misled by the URL and title of the document, both of which say Manifesto and not manifest.

On a less snarky note (sorry about that), it seems like a good check list for putting together an event I'd like to attend. As someone else noted, none of the demo-parties and hackathons I've attended have ever checked off every box. On the other hand, it might be a cultural thing -- I imagine these events to be more developed around the valley where they're more common.