Author of the talk here. Thank you, you made my day by sharing my presentation. :)

One thing I would like to add after reading some of the comments here. The "1 billion requests/day" is actually an understatement so the title has a nicer ring. Last time I checked we were around 2B -and that's according the most conservative approximation-. Those are requests that hit the application, excluding the CDN caching layer.

BTW, happy to answer any questions!