The Metron rear derailleur also uses an oversized lower jockey wheel - it has 15 teeth, to provide a larger turning circle and supposedly lower drivetrain friction. SRAM has publicly stated that they have tested this setup, but chose not to implement it for the new RED.
Our second day on the Interbike showroom floor was another great harvest of gear photos and new info. Today we looked at a variety of things, from Campagnolo EPS all the way down to a simple BTA bottle from Profile Design. There's plenty of great stuff in the gallery - have a look, and check back in tomorrow for our final gallery.