Many websites use real user measurement data to analyze their performance, as well as to validate that optimizations are having the desired effect on end user experience and business metrics. Akamai's mPulse service is a popular commercial RUM solution that is used by thousands of websites, and it gives us a unique panoptic view of web performance. This is not your typical RUM talk. I won't be talking about implementations, product features, etc. Instead we are going to dive deep into the data and try to answer some interesting questions about the web.