I'm not sure this link is very relevant unless you're trying to posit that popularity ~= quality in some way? If you're interested in further testament to its

I'm not sure this link is very relevant unless you're trying to posit that popularity ~= quality in some way? If you're interested in further testament to its popularity, builtwith.com is always a fun read. I believe about 20% of the internet runs WordPress, a number which grows to approach 70% if you exclude sites not using off-the-shelf cms software.