Jom Comment
http://extensions.joomla.org/extensions/contacts-&-feedback/articles-comments/676/details

I would turn it around and ask "surely WordPress can't be THAT bad as a CMS"?

Since WordPress started as a blogging solution, its obviously better suited for it. Likewise Joomla has CMS features built-in to its core that would require multiple 3rd party plugins to accomplish the same functionality in WordPress. Also I find far more sophisticated 3rd party add-ons and themes available for Joomla.

That said, I love WordPress and look forward to seeing it adopt more CMS type capabilities into its core.