> Postscript: Right after this posted a few people tweeted that this new top ranking is based on Yahoo’s Tumblr acquisition. While the first chart suggests in a footnote not reproduced above, that some portion of Tumblr traffic has been assigned to “other sites,” it’s still ranked separately at #28 above, with 38.3 million uniques.
> The Yahoo and Tumblr traffic figures have not been combined (or entirely combined) by comScore. It’s possible that some “assignment” of a part of Tumblr traffic to Yahoo is responsible for the boost. However that’s not clear at the moment.
[1] PDF @ http://www.comscore.com/content/download/20239/1035515/file/...
http://yahoo.tumblr.com/post/52805929240/yourname-yahoo-com-...