Yeah, and they lie in their first example. The "example code" is nothing like their real demo code. If it was, you'd be able to use their select boxes if you had JS disabled...
Just a side note, it took me a few tries to hit "OSX." My first two tries were "OS X" and "Mac OS X", before I noticed something was coming up and disappearing when I typed the "OS X"
Also, Chosen only works with the <option> tags, which can be quite annoying. And to me, the Select2 community seems a lot more active and able to participate in the project.