We haven't announced this survey on wikitech-l yet, so if you run a wiki outside of those run by the WMF, please take the time to fill out the survey at http://hexm.de/MWSurvey. More information about the survey and its purpose can be found at https://www.mediawiki.org/wiki/2015_MediaWiki_User_Survey.
That said, we received a report (T104010) from the Analytics team today that most downloads of MediaWiki are coming from China. The report indicated there were twice as many downloads from China as the U.S. in June.
I don't know of a good way to reach these users -- I wasn't even aware of them till today. Through our efforts at outreach so far we've uncovered a number of private wikis that we wouldn't have been able to discover otherwise, but I'd like to extend our reach even farther.
Can we add a link to the survey to the top of https://www.mediawiki.org/wiki/Download until the end of July?