I hadn't really thought about the age disparity btw RDjr & McAdams, but perhaps that was subconsciously part of the reason I was initially dubious about her playing Irene Adler. But, I was pleasantly surprised by how well she carried off the role. And thankfully, they got rid of that skanky red corset from the trailer. She was much more believable and dignified playing the scene in the buff/towel.