It's 50th in a pretty popular, if not slightly irrelevant, music publication. That ain't nothing to argue with about outside of the AP bubble. If anything, I'd actually like to see AP highlight the list a bit more other than saying, "fun. is 50th. Carry on." Not a big fan of that mentality.
As with most end of the year lists ... absolutely no recognition of "scene / underground" music. If I don't see mewithoutYou or The Menzingers mentioned than the entire list immediately looses its credibility with me.
Sidebar: Glad Japandroids are getting the recognition they deserve