Poor connections are a bit irrelevant though for the purposes of ranking URLs by page load time. Presumably whatever bot google would use would have an extremel

Poor connections are a bit irrelevant though for the purposes of ranking URLs by page load time. Presumably whatever bot google would use would have an extremely fast connection, so if the bot loads it faster than X where X is reasonably selected, then it could be considered "fast". Percentiles might make even more sense here -- if the page is in the top 5% of all pages in terms of short loading time, then it is "fast".