Think of your favourite albums; the ones you listen to 'as an album' rather than just for a couple of killer tracks. What are the running times of those albums?
We were discussing this at the weekend and came to the conclusion that the ideal running time for a single album is between 40 and 50 minutes. Any longer than that and it doesn't work quite so well as an album, even if the individual tracks are absolute winners. Is this because in these modern times our attention spans aren't what they were or is there some truth in this?