@Brian Krogsgard - Well, I didn't say half of all websites, I said practically half of the top 10,000 websites recorded by BuiltWith Trends if you wanted to get picky, you could pick from any number of analytic companies and come up with a number based on who is in their surveying group.

@Giovanni - The numbers are not wrong and are specific to the surveying group that Builtwith Trends has. The numbers change from week to week so they could be a little higher or a little lower but when I wrote this post, you can see in the screenshot that the number was for the top 10,000 sites monitored by Builtwith Trends.