The full discussion can be found HERE (must be a member to read, but Bhuz is a great resource--you SHOULD be a member and participate!).
From a technical perspective, everything done is tribal is geared towards enhancing and facilitating the group dynamic. Arms have fixed positions (frequently uplifted and away from the body) in relation to the corresponding hip and body movements because they are the primary cue mechanism. Formations are placed so that everyone can see the lead as well as be seen by the audience. There is not often a great deal of footwork or lateral traveling movements because you can't count on having the space to move an entire formation. Movements are kept simple and uncluttered to best emphasize the unsion of the dancers.
