Pinterest sees more US traffic than Tumblr

Social pinboard site Pinterest is now bigger than Tumblr in the US in terms of web traffic, with a number of data sources showing that Pinterest's huge growth at the beginning of the year has bumped it past the blogging site. Analysing sources such as Alexa and comScore, a report from Royal Pingdom finds that US visitors to Pinterest are now beginning to surpass other social sites, though it is worth noting that there is not enough data to show whether this growth is being sustained over the course of several months.