A more accurate analogy would compare it to DNS requests instead of visits. I don't know that there's any scientific research out there correlating percentages

A more accurate analogy would compare it to DNS requests instead of visits. I don't know that there's any scientific research out there correlating percentages of DNS requests to visiting a website. That said, it's not an unreasonable assumption that the overwhelming majority of requests for any given domain hosting a web server are for actual users to fetch the content hosted there.