Does WordPress power 27% of the internet?

WordPress powers 27% of the internet. Every year people repeat the claim of WordPress to an increasing share of the internet. The number is so large that other people naturally question it.
So… Does it?
By top sites sample
The 27% number and its previous incarnations come from W3Techs WordPress market share report:
WordPress is used by 58.5% of all the websites whose content management system we know. This is 27.3% of all websites.
w3techs.com/technologies/details/cm-wordpress/all/all
There are several notable things about it in relevance to the claim:
Report surveys top 10 million sites by traffic (provided by Alexa), which they consider representative of the entire web.
Rather than “powers” it words it as “used by” for which it considers if WordPress is detected on any page of the site.
So the claim seems to hold (if exaggerated — “powered” is a stronger word) and number is consistent.
By large sample
Still, 10 million is a rather small subset of the internet. Internet live stats estimate total number of sites to be above one billion in 2016. Alexa 10 million sample makes less than 1% of it. Selected by traffic, not meant to be representative
Source: https://managewp.org/articles/14084/does-wordpress-power-27-of-the-internet

source https://williechiu40.wordpress.com/2016/12/27/does-wordpress-power-27-of-the-internet/