Re: Drupal is
In our testing stock Drupal (with APC and Drupal caching) couldn't match an old fully-loaded Joomla (without APC). When we added APC to Joomla it was game over.
Please note that I don't like Joomla either, I think all CMSs are a pile of rubbish. But at one site I ended up with APC, Drupal caching, memcached and even then they could only get about 30 req/s.
In the end, I found the best way to get performance out of Drupal was to not use Drupal. And run Varnish on top. Wooooosh! :)
Don't even get me started on PHP code being stored in the database and eval()'ed out. That is insanity.