I haven't used Wordpress much, but I am working on an Orchard site at my current job. It's a CMS kinda like Wordpress, but built on C#/ASP.NET. Our dev team is mostly working on a dozen or so custom-coded account management pages in a separate module, but most of the content is marketing material as pages built in the Orchard management screens, kind of like blog posts, but arranged like a conventional website.

The developers aren't terribly enthusiastic about working with those Orchard pages, since they're tough to collaborate on and version control. But the Marketing people seem to like it just fine, probably because conventional web site building tools, like writing HTML and CSS and managing folders of content with source control tools, is too complex and error-prone for them, and the site UI is worlds better than any other technique they might be willing to use. I'm guessing Wordpress works in a similar way.

Now that I think about it, I had always idly wondered whatever happened to those desktop GUI web page building tools, like Frontpage and Dreamweaver and such. They may still be around, but don't seem to have any mindshare. Maybe it's because the people who were using them put up Wordpress sites instead and are building their pages in the Wordpress UI.