I would assume it would be for all mutants who gain their power back. Rogue would most likely get her powers back as well and it could be explained in the deleted scenes. It is possible for her powers to come back while she touches someone, but I would say that her powers would come back gradually. Magneto's obviously did since he moved the chess piece slightly.
Since DOFp changed things a little or a lot depending on how you look at it. This discussion seems no longer revlent