Overall, the wiki is an excellent resource. It has good summaries of a lot of information.
However, there are a small number of dedicated people that keep things updated. They can't and won't get to everything. Parts of it will be outdated or incorrect. Then, you start getting into areas concerning biased edits (usually not by the dedicated core, but rather by people with axes to grind, etc.) Some of the things I've seen are pretty much blatant propaganda. (Which may well be fine, as long as you realize that's what you're looking at.)
Ultimately, the wiki is still a great collection of information. But you need to double-check everything on there. Too much in CN changes too quickly for the wiki to keep up with it all.