Let me sum it up.
Make crap music with only one good song on the CD and singles are going to sell better than the whole CD.
I can’t listen to just one song off of “The Wall” by Pink Floyd. It’s just not possible. I find myself already humming the beginning of the next track. But try to listen to any of the pop music out there all the way through and you will be track hopping before you get half way through the CD. Some people say that it’s our cultures built in ADD tendencies but I say it’s just crap music.
Prices are going up. It's common to find albums selling for $14 online as opposed to that originative $10 mark, and the music industry is finding that selling singles online hurts the bottom line.