Well, it sure has many things in common with the prog scene. Too many to not concider it progressive: the "randomness" of some riffs, the way they use high pitched harmonics, the length and diversity of the song. Those are elements not as common in "emo music" (whatever that is?), at least not from my experience. Also, as many progressive rock/metal, they have a lot of choir and concert song. But they are definately on the "emo" side of the prog scene, if such side exisist - especially as a result of the effects on the song. Even if I know I've heard something like that in a undoubtely prog metal song (that I can't remember right now).
But then again, please remember that many of the prog metal/rock bands are much more "emotional" than both the oil soaked and the dragon slaying metal bands out there. Especially if they are more of prog
rock than prog
metal.
http://www.youtube.com/watch?v=AxLaf3y6sDA
http://www.youtube.com/watch?v=uHgrma1JM2Q
No, you won't understand the setting if you watch the first video. And yes, it takes like four minutes before he starts to sing in the second video.