Released in April 2012, Wordpress has 72.4 Million sites out there. According to the Stats on the Wordpress site they say there's more than 342 million people view wordpress sites and more than 2.5 billion pages were loaded.
Going to be tough to beat those numbers.
Wordpress has evolved way beyond being just a blog app. Its ease of use, and inherent seo ability, massive support, plugins for everything you can imagine, and huge amount of themes make it the #1 cms...hands down.
Wordpress is user friendly. But I feel template of Joomla looks better.
There are no limits to what you can make it look like and the same goes for Joomla as far as that goes. You can make a Joomla temp look exactly like wordpress and vice versa so kind of a "null pointer"
Then I have a follow-up question. Which CMS (WordPress or Joomla) provides easier admin/editor management in terms of website updates?
I've never used Joomla, but from the intermediate experience that I have with WordPress, it is not that straightforward to update the pages and add new information, except for new blog posts. I've always had a hard time figuring out how to create/add/edit regular pages and then link them up together in WordPress.