DK is unsurprised.
I heard this song the first time while waiting for TV on the Radio to come onstage (great show), and it got its hooks in me instantly. There were lots of warm summer days soundtracked by this song, as well as the rest of Currents.
I haven't solidified a lot of my list, but this one has been the only realistic choice for "Song of the Year" for me.
Weird that the next song on the album is the worst song created by an artist that I like all year.