Just something I've been curious about. How come the 15-inch rMBP still has a speaker grille? I know this used to be normal on a MBP, but it seems like Apple is removing stuff like this from now. And from what I can tell, the sound on the 15-inch is not that much better than on the 13. The grille just kind of contributes to the large size of the 15, so I was wondering.