Automattic has said for years that they (Wordpress) power X% of the internet.

Before wordpress.com users had to actively choose WP.

With the advent of wordpress.com and it's 'freemium' tier that arguably started to distort numbers. After all, stale, dead "Hello World" blogs count toward stats.

Now, with Tumblr, Automattic will say they power X+% of the internet

When Automattic buys Blogger, that boast about powering % of the net will increase even further.

It's a takeover, not user choice.