To analogize the Drupal to Joomla comparison – it’s like comparing CubeCart to Miva Merchant in the eCommerce world – why mess with a bulky system when a more beautifully framed system is ready, more search engine, modification and GUI-friendly at the base? by mere file size alone, the latest production sits at a little bit over 1 megabyte. Joomla is 6 times larger, lacking in content creation, skinning abilities and traffic intake...All effecting load times.  Some may argue that Drupal's skinning/template system is difficult but once you get over the learning hump. It makes sense and will make you question the use of any other system.

To compound the discussion, all of these high profile companies or entities use Drupal
Whitehouse.gov
Other US Government websites
General Motors
The World Bank
Sony
Symbian
nVidia
Procter & Gamble
Intel
The list just keeps going on...

Others choose to ask why we no longer put our very own OptionEdit content management system on production websites.  The answer is simple: Drupal has all the flexibility we need when building custom CMS websites. When customers, however, do just need the out-of-the-box features the OptionEdit contains. We work it like a bulb in a chandelier.