Msg#: 3937356 posted 5:49 pm on Jun 22, 2009 (gmt 0)
Since The Onion serves up mostly to anonymous users, the DB load on drupal would be light, and not really comparable to a site where the primary mode is to be logged in. You can still do a lot of caching of specific objects, but with authenticated users, you can't statically cache entire pages, so the DB load goes way up.
WP can certainly handle that sort of load - Wordpress.com just runs on WordpressMU (which, not counting the multi-domain wrapper, will be fully merged with Wordpress for version 2.9 or 3.0). See: [en.wordpress.com...] To see what Worpdress.com is serving with their own dogfood.