"Lying on a desert plain with mountains to its north, the city is exceptionally expansive with the core of the city on higher ground than the outlying regions to the southwest on the banks of a river. The city became the capital of the Terran Dominion and during the Brood War the it was the most heavily fortified city in the Dominion."
Words more or less to that effect, it's around the time when Tosh and co. are moving in on the palace. It made me a bit uneasy since a lot of that was based on observation of the map layout and loading screen. But hey, Spectres canonized it apparently.
It ain't just that. When I submitted The New Order in one of Blizz's writing competitions, I included the idea that Augustgrad was named after Augustus Mengsk, an idea Blizz apparently liked when they confirmed it on Korhal's star system page.
Or more likely it's coincidence. But this kind of thing isn't too uncommon in fandom (see http://www.halopedia.org/URF#Production_note for an example). Another example was on ff.net, where an author copy-pasted the CnC wiki's Tiberium War articles as part of the background of his/her story. Still, I don't begrude Spectres, since there's only a few lines in question, and a wiki has no ownership of material after all.

