I think what we should do is to give the year a rating.
2011: A year with not many massive hits (at least when compared with 2010) but one that sees a dearth of electronic music as well as albums (like Destroyer) which grow ever so much. I can see myself really liking this year given a couple of years but at the moment it's only a 6/10.
I'd give 2011 an 8/10 for albums, a 6/10 for songs, and a 10/10 for depth. But I've listened to more 2011 albums than albums from any other year, so I might be a little biased about its depth.