Is Drupal the best CMS for publishers?

I've just reviewed a new report on Drupal written by open source expert, Seth Gottlieb from Content Here.

In the post I write that: "Drupal gets the job done according to Gottlieb. The report however also points out some helpful caveats; especially with regards to 3rd party modules and the upgrade process. For a future edition, a mention of Drupal’s handling of accessibility and standards would be a valuable addition."

I was wondering if anyone in here could share some more knowledge about Drupal vs. accessibility and standards? If so, feel free to drop a comment on the blog: Is Drupal the best CMS for publishers?

Thanks!