It's sacrificing the open web in exchange for a is-this-fast indicator. If the search engine just made note of the site's speed during its crawling, and made th

It's sacrificing the open web in exchange for a is-this-fast indicator. If the search engine just made note of the site's speed during its crawling, and made that information available to the user, then sites everywhere would find their own ways of speeding up their whole site instead of just some proprietary search result.