I think a lot of people would like the song better if they didn't hear the preview first. I don't feel like gleaning the forum, but I remember reading a few people saying they were excited when they heard the preview and then got their hopes up and disliked the full song.
I gotta say that happened to me when I heard the hals mix of Far Away in that cellphone commercial
It was so mystical and surreal sounding, and I got so excited, and then when I heard the full version I found out that part in the commercial was just a small sample of the full song and I really hated it. But oddly this time around i hated the preview for terminal and loved the full version. lol