Sorry to bring this back, but this is false. eHRPD acts as a handshake between *1X* and LTE. Not 3G. 3G is ONLY an EvDO technology. eHRPD can fall back on EvDO if it can't handshake between 1X and LTE, but it will still show it as eHRPD. When you're on 3G, you're on Rev. A, not eHRPD.
Fun fact...