It's really hard to compare different systems without knowing what kind of complexity each pageview engenders in terms of backend processing.
At one end there's flat HTML files, where you could serve 800 million pages/month from maybe a single particularly beefy server; at the other fully-dressed SOAs and CEPs and your uncle's pet dog rover performing multivariate regressions, meaning you need 9,000 servers.
I'm hoping they'll provide some more insight into what the breakdown of tasks are between the machines, and if that 800 million number is actually correct.
It seems extremely high for what my absolutely-no-idea-what-these-sites-could-possible-need-that-many-servers-for thought process can fathom.
At one end there's flat HTML files, where you could serve 800 million pages/month from maybe a single particularly beefy server; at the other fully-dressed SOAs and CEPs and your uncle's pet dog rover performing multivariate regressions, meaning you need 9,000 servers.