Perhaps, but pageviews (or 'hits' before marketers had to find a new name for it) have long been known as "How Idiots Track Stats." Especially these days where

Perhaps, but pageviews (or 'hits' before marketers had to find a new name for it) have long been known as "How Idiots Track Stats." Especially these days where dynamic content is king over individual page loads and selling ads on a CPM basis are only done by the shadiest of firms. Things that matter a little more these days, which I'm sure Facebook is also doing well in: engagement*, time spent per visit, average visitor return rate per (intra-)day-week-month, and adoption rate of new initiatives (Places, Groups, etc.) All the in-Facebook statistics I'm sure they're tracking such as number of profiles visited, messages sent per user per day, and all the other goodies. Forget "25% of all US Pageviews," I'm curious what percentage of US internet users' free time and attention they receive. That's a seriously good number for the site.