Well, I think it really depends on the song, and the mood, it’s setting up. Sort of like the overture, of an orchestra, or an opening title sequence in a movie.
For example, the Death Cab For Cutie song, "I Will Possess Your Heart," has that amazing 4 minute intro, which perfectly sets up the mood of the song. Except, the intro becomes less and less amazing, sometimes to the point of annoying, the more times you hear it.
At the same time, The Grateful Dead, or Phish or Widespread Panic fans expect that style.