My anecdata indicates the opposite, as far as quality of recommendations is concerned. Curious how matters of taste might mean that you can't accurately make sweeping generalizations like this.
Music preference is not something you can generalize to a group of people. For example, I may like one song from Taylor Swift but not anything else. You may be right for popular songs but where Pandora's genome project shines is recommending music you would never otherwise discover.
If your suggestions are based on crowd sourced data like play count, your recommendations will be further encouraged by recommendations and thus become obsolete over time.
