One thing I've heard about other incubators is that they demand a large amount of your attention, in a way that is more like working for them rather than as your own boss. This is interesting because it would seem to challenge the entrepreneurs' drive for independence, which could be harmful to their success. Contrast this with YC which gives you more independence and simply offers "office hours" and weekly meals, where it's up to you to make the most of them.
Has anyone else experienced this?