If you watch the replay, Rooney ran into the goalie, he had plenty of time to jump.
I've never figured out why they give penalties when the ball is moving away from goal so obviosuly it is not a scoring chance, as penalties are meant to replace the scoring chance lost!!
Just beacause something has always been that way does not mean it is right nor fair, the penalty area should be smaller, and more of a V-Shaper to take into account the angles.