Imo Vettel didn't _have_ to move across. He could have gained the position by braking straight (or watching when Webber moves to the outside) and positioning himself in his team mate's exit line instead of assuming that there was going to be space. Vettel had the right to hold his line because he had overlap, but Webber had no need to move anywhere because the pass wasn't complete. I understand why it could be said to be 50/50, but I don't agree with that.