Tumblr is on a tear, now clocking more monthly pageviews than Wikipedia:
To get a sense of how much of an outlier Tumblr is when it comes to pageviews, let’s take a deeper look at the comScore numbers. (ComScore’s estimates are lower than Quantcast’s, but show the same general trends). In August, Tumblr entered the top 100 sites comScore tracks (at No. 99) with an estimated 41 million unique visitors. But it’s estimated 6.5 billion pageviews a month places it at No. 21 among all sites ranked by that metric. By comparison, the Wikimedia Foundation sites (which includes Wikipedia.org) get 423 million unique visitors a month who generate 5.6 billion pageviews.
Tumblr is also bigger than Twitter.com in pageviews (but not in unique visitors), and is about half the size of AOL and Craigslist. Below is a snapshot of where Tumblr ranks in Pageviews compared to other select sites in the ComScore Top 100.