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Last.fm is reporting that the new single from Coldplay, "Violet Hill" is getting played about once every 2-seconds. This is of course a similar tactic pioneered by Radiohead last year, and Last.fm is reporting that its rate of play is outstripping the trend setters own song, "15 Step".
It may be a bit disingenuous to compare the songs, let alone the bands, due to differing fan bases, and also system of release. "15 Step" was released as part of an album, while "Violet Hill" is a single, so it is far easier for someone listening to an album for the first time as they want to hear all the songs at least once, and then go back to their favorites.