While Wordpress offers a one-click update (at least most of the time), Drupal still requires the administrator to delete folders and update the whole installation. This is a roadblock for non-tech users who would otherwise user drupal for their sites.

While it is unclear whether this represents major changes to the underpinnings of the program, an abundance of caution, a rigorous demand that the administrator be tech savvy, or simply a method of simplifying coordination of a product with multiple maintainers, it is something to consider when thinking about what CMS to use.

In my experience, among open source CMS, drupal has the most flexible set of options for a wide range of tasks. It allows for easy customization, robust inclusion of content other than text and simple images, and a host of easy features such as polls and simple forums.

However it is not the easiest of the CMS to update.