Earlier quoted context omitted.
Which top 10 site is running on wordpress? And how much of it is static content being served by a cache and completely avoiding wordpress at all?
Fair question: WordPress.com. This list from Quantcast has WP.com at #16 https://www.quantcast.com/top-sites/US/1 But that only includes *.wordpress.com subdomains, and our highest traffic blogs almost always invest the money to have their own domain. We have a tag[0] to track those in Quantcast, and it's currently at 129.7M people in the US, which would place it between Facebook (143M) and MSN (98M). (Blogger might…
I agree that using caching is normal, but the difference is the total reliance on caching. I wouldn't be impressed with google's scalability either if it were 99.9999% static pages being served up.