Marybeth Schroeder should give up her day job if she had problems with the Wordpress administration UI, compared to Drupal and Joomla the Wordpress UI is the cleanest and most intuitive out of them all.

Joomla i would say has to be the worst overall, personally my copmpany has used it for several projects in the past and due to continuous problems we no longer use it in a professional capacity or accept work that requires Joomla to be used.

Drupal on the other hand is good for certain projects if you can get your head around it's theme engines and learn how to override functions etc, it was the perfect choice for WPscoop when we wanted to create an advanced Digg.com type website dedicated to Wordpress.

Overall though Wordpress is our chosen system and we use it in around 90% of our projects and that of our clients, WP has come on leaps and bounds in the past few years and is still sometimes sorely underestimated by professionals as merely a blogging system which it is not.

So wordpress win's for me every time :)