Currently, as I write this, they’re discussing how often to have General Assemblies and whether there should be a quorum (of 50?) for making decisions. They endlessly discuss process and how to make decisions. They bemoaned low turnout. I listened for about an hour. Sounds unproductive.
Sometimes top-down, centralized, hierarchical organizations, with lots of rules, are most effective at getting things done. In other cases, bottom-up, organic self-organizing organizations may work best. Best is probably a mixture of both. It seems to me that Occupy needs more structure, but I understand that that goes against the spirit of the movement.