Google Serves 25 Percent of North American Internet Traffic

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"Everyone knows Google is big. But the truth is that it’s huge. On an average day, Google accounts for about 25 percent of all consumer internet traffic running through North American ISPs." (..up from 6% three years ago)

http://www.wired.com/wiredenterprise/2013/07/google-internet-traffic

And how's this for a real-life '3D Pipes' screensaver..