I don't mind if Link is the default name. The only voice acting we've seen was from that intro scene, right? It could be just a thing for the E3 demo. NPCs certainly don't have voice acting as far as we know; maybe in cutscenes though. If they decide to stick with that intro scene, then it's pretty likely that Link will be its name by default. I didn't have an option to name Nathan Drake anything else than his default name, this is no different. I always named him Link anyway, so it's not going to be a difference anyway.