Tim,
The MediaWiki Stakeholders' Group recently surveyed MediaWiki users with
regards to their use of the software. We summarized the results and the raw
anonymous data on
MediaWiki.org
<https://www.mediawiki.org/wiki/2015_MediaWiki_User_Survey>. It might be
worth looking into.
Additionally, we did ask respondents if they would like to be contacted for
follow up discussions. We have yet to do so, but perhaps this question
would be a good time to engage these folks. Let us know if you'd like to
work together on figuring a way to best handle outreach.
Yours,
Chris Koerner
clkoerner.com