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Twitter’s traffic comes from SMS, Instant Message, Mobile Web, and all those wonderful API projects out there. However, we also have good old-fashioned web traffic. 60% of our web traffic comes from outside the United States and this chart shows the top ten non-US sources.
Update: Remember this is just web traffic. It doesn’t include any of the other popular ways that people use Twitter. For example, Australia ranks 6th if we look at SMS usage. We’d get altogether different numbers if we looked at instant messaging, m.twitter.com, and API devices such as Twitterrific.