But here’s the thing: In each of the eight social worlds, the top songs–and the bottom ones–were completely different. For example, the song “Lockdown,” by 52metro, was the No. 1 song in one world, yet finished 40 out of 48 in another. Nor did there seem to be any compelling correlation between merit and success. In fact, Watts explains, only about half of a song’s success seemed to be due to merit. “In general, the ‘best’ songs never do very badly, and the ‘worst’ songs never do extremely well, but almost any other result is possible,” he says. Why? Because the first band to snag a few thumbs-ups in the social world tended overwhelmingly to get many more. Yet who received those crucial first votes seemed to be mostly a matter of luck.

http://www.boingboing.net/2008/01/28/tippingpoint-skeptic.html