I'm in the process of setting up several Drupal websites and I wonder which I should use for the domains: with or without ".www"? Why drupal.org is not www.drupal.org? Which works best in terms of SEO?
I like the shorter URLs and the fact that it forces to navigate the site via a unified URL scheme. Besides, it seems to have worked well for Drupal in terms of SEO (Homepage PR = 7/10 at the time of writing) and comments elsewhere indicate that "if the site can be accessed as either "example.com" or "www.example.com" then the search engines will split the indexing of the site between them two, splitting up the pagerank" (http://drupal.org/node/38003#comment-86406). Is that correct?