He’s complaining about application speed. Not about his domain actually working. He gives a URL and mentions in comparison which would conclude he has tested it and it is working, just very slow.
And, I can confirm it’s slow. Although I’m not surprised. MediaWiki is a beast and one of the main reasons I hadn’t installed it was due to it’s slow speed. MediaWiki isn’t good unless you have a caching system in place for it. I’m not aware of any third party caching mechanism that DH might have for MediaWiki (MMCache or eAccelerator). I cannot comment on MediaWiki’s speed with or w/out caching as I don’t have any extensive experiences running it myself.
yerba# rm -rf /etc