Thirty seconds of fame

I was just listening to the preview of Blake Shelton’s Playboys of the Southwestern World on iTunes, and it got me thinking. The preview starts at the chorus, and it fit exactly. The sound clip starts just after a verse would have ended, and stops just before another would have begun. You get to hear the entire chorus, but with no cut-off lyrics or sudden stops in the middle of a musical phrase.

This got me thinking: Does embracing modern music distribution mean composing your songs to have the perfect thirty second preview?