User blog comment:Sannse/Your First Look at the New Wikia/@comment-168424-20100818204624/@comment-761251-20100818225011

I'd assume they're using, that's the first number on Special:Statistics on most MediaWiki installations; it is somewhat configurable what gets counted, but usually it only includes mainspace and excludes redirects, stubs, and dead-end pages (i.e. pages that don't contain a link). The number itself is not a new wiki feature; and displaying it openly has been a feature of w:c:answers: for quite some time now, as have some of the openly displayed credits.