That's my understanding. We frequently build websites for clients on Wordpress, and certainly aren't intending to release them under GPL, although I don't think

That's my understanding. We frequently build websites for clients on Wordpress, and certainly aren't intending to release them under GPL, although I don't think it would make a huge difference in practice. The fact that Wordpress delivers the content to the theme is basically irrelevant in my eyes. All the work goes into the design, HTML, CSS and Javascript, and the end product is an original work.