FaceTime over 4G LTE network on new iPad

I am wondering if the 4G LTE iPad will support FaceTime over the 4G Cellular Data? It doesn't support the built-in 3G. Will it be supported on 4G LTE?You can only use FaceTime to another iOS device over WiFi network. Apple don't want to take long discussion with many mobile carrier, so they have no choice to restrict Facetime using cellular data. But you can FaceTime over 3G or 4G after