In reply to Andrew.

Actually, I agree. A friend of mine pointed this out:

WordPress zipped download 8.4 MB (uncompressed about 21 MB)

Joomla zipped Download 11.6 MB (uncompressed about 30 MB)

For anyone who is not familiar with Joomla! It's a full on CMS that can do a ton more than WP, and when you look at the size of WP, it's closing in but does only a fraction of what Joomla does/has.