Well, guess who the researchers at Wikipedia are? They're guys like you and me who edit the pages on their own time with no requirement for any certain level of validation. There are people who check newly added or edited pages (they're volunteers, just like the people who enter the information), but if someone makes a citation, like to a book or website, they'll usually let it go at that. I've edited many pages to add information or correct errors under a pseudonym. But sometimes, there are things that can't be corrected.
If you search, for instance, for "Ford Model B", you'll see that the page should be titled "Ford Flathead V8 cars" or something like that, with the Models B and C as subheadings. I've been trying to get that corrected for 18 months or so, but since the Model B page is a "root" entry, all the gurus I've corresponded with have told me that it can't be changed. I asked, "what would happen if I started a section for Ford Automobile and then added all the different models as subheadings. They said that wouldn't work, because someone has already added the models as roots. Look for Ford Automobile and see what you find.
You can also look at Land Speed Record. Until late last year, there was very little about it. I added the section for "Piston-Engined, Wheel-Driven" (FIA category A, Group 1, Class 11) records, since I'm on a team that's going after the unlimited record. The only thing that was questioned was the release of my photographs to Wikimedia Commons. Nothing about speeds, dates or any other verifiable fact was questioned, since I cited my own website as one of the references. The info there is valid, but it isn't official. The other two are cites that I know are well-researched (but not official), but not the actual FIA record site which is impossible to link to for a given class.
So, while Wikipedia is a good place to start, it's, in my opinion, a good place to start, but further research is needed to corroborate facts, especially if accuracy is the goal as it seems to be here.
I hope this sheds some light on Wikipedia.
RtR