User blog comment:Toughpigs/Create a new article - feature update launching next week/@comment-13301-20100130103917

Red links always trigger the dialog. I think this shouldn't affect Special Pages (RecentChanges, WantedCategories, WantedFiles, etc) nor page histories, because if you follow a red link to a non-existant userpage/talkpage from there is probably because you want to check other things, like whatLinksHere, contribs, page history, etc.

For the same reason, only links to Content pages (usually namespace 0) should trigger the dialog, as there's no reason to choose a layout for a missing Template, to start a talk page nor a category.