You can get a taste of the XP-Seminar large group time in this 60 second clip of Larry Osborne at the 2013 XP-Seminar. Personalized Discussion [...]
The group is limited to 200 people. This allows anyone in the room to speak with one of the Keynote Presenters. It also allows for discussion around tables.
What you will find is people from a church of similar size to yours!