Folks were tweeting 5,000 times a day in 2007. By 2008, that number was 300,000, and by 2009 it had grown to 2.5 million per day, he says. Tweets grew 1,400 percent last year to 35 million per day. "Today, we are seeing 50 million tweets per day—that's an average of 600 tweets per second," says Weil.
Tweet deliveries are a much higher number because once created, tweets must be delivered to multiple followers. Then there's search and so many other ways to measure and understand growth across this information network. Tweets per day is just one number to think about, he says.
Still, as with Skype's "concurrent users" metrics, it is a milestone.
