That may have been the case at one point, but Spotify has used their own recommendation system for a while. http://www.quora.com/Spotify/Pandora-radio-is-built

That may have been the case at one point, but Spotify has used their own recommendation system for a while. http://www.quora.com/Spotify/Pandora-radio-is-built-on-their-music-genome-project-How-does-Spotify-program-their-radio-stations http://www.quora.com/Spotify/Pandora-radio-is-built-on-their...