User blog comment:TOR/MediaWiki Upgrade/@comment-25044414-20120613125206/@comment-23865-20120613130904

The first wikis we're going to migrate to the new version will be special test wikis that we're going to setup just for this. Once those are up and tested we'll move on to the medium-traffic tier for a few select real wiki test cases, and then go on to the top 5000.