WopOnTour,The problem is the SAE disagrees with you. A "hybrid" by SAE definition must have 2 different sources of energy that directly provide torque for propulsion (from either/or both simultaneously). Since the Volt has only 1 direct source of propulsion, the electric motor drive, it's an electric vehicle (EV) with a range extending feature powered by an ICE- hence E-REV.
Thanks for explaining it so well. The REEV or E-REV nomenclature will stand, because it so simply and perfectly explains the concept.