I tend to think the other way around: my writing style doesn't suit the wiki. 
The wiki is a great source for users with some experience; it's occasionally terse, but that's not a problem given the audience. I, on the other hand, tend to write for someone new. Also, I tend to disagree with some of the wiki's mantras, specifically 2 (Avoid duplicating information within this wiki) and 3 (Avoid duplicating upstream documentation). In my opinion (and it's only an opinion), they sometimes clash with mantra 1 (Articles must be easy to read), which (again, in my opinion) is the most important mantra.
Perhaps more importantly, since you and I last had this conversation, I actually applied for a wiki account, tried to contribute to the wiki, and quickly found the wiki authoring process to be somewhat on the clunky side. Here on the forum, the author's workflow is such that I actually enjoy writing. On the wiki, it's just not. I guess it's the author's UI showing its age...