How fast Google rates your site?

Google now  brings data and statistics specifically applicable to your site, on Webmaster tools. On Site Performance, you'll find how fast your pages load, how they've fared over time, how your site's load time compares to that of other sites, examples of specific pages and their actual page load times, and Page Speed suggestions that can help reduce user-perceived latency. Their goal is to bring you specific and actionable speed information backed by data, so stay tuned for more of this in the future. screenshot of Site Performance The load time data is derived from aggregated information sent by users of your site who have installed the Google Toolbar and opted-in to its enhanced features. They  show the performance charts and tables when there's enough data, so not all of them may be shown if your site has little traffic. The data currently represents a global average; a specific user may experience your site faster or slower than the average depending on their location and network conditions.