I keep pendind to review a nice image showing a lot of data about WordPress. Some of them are really impressive, for instance, according to Alexa 22.5% of 1 top million ranked use a CMS, and on the top of the CMS you gonna find Word Press.
As long as I’m concerned by language issues I’ve looked more deply on languages data. Number one, as you may imagine is English, but number two is Spanish!. Portuguese is third position and Catalonish does not appear.
I’ve found a huge number of WordPress sites running on version 2 instead of version 3. Sure they got very good reasons… or so I hope, ’cause it’s really important to get updated, don’t understimate security issues.
You may have a look by your own to this interesting amount of data.