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.
God forbid a magazine that doesn't particularly cover punk music too often include the Menzingers...it's geared towards their audience. 75% of Spin's readers probably haven't even heard of the Menzingers.