CMS Trends: WordPress vs Drupal vs Joomla

Which is better?  WordPress or Joomla or Drupal?

According to Google Trends, WordPress continues to be red hot, Joomla rose to its peak and is a falling empire, and Drupal grows slowly but steadily.

The winner for most websites appears to be WordPress.  Although Joomla is still more prevalent than Drupal, it appears that Joomla is on the way down and Drupal continues to grow in popularity, particularly for more complex enterprise level websites.