Bufferbloat and speed test results

These results involve statistical averages over a limited time horizon, and ISPs have no control over which customers run tests, which equipment they have at home, and how that equipment is configured. All of these factors can strongly influence results. It is likely that the "best" ISPs have paid some attention to reducing bufferbloat, and it is also likely that many of the "worst" ISPs are distributing home modems or routers that are poorly matched to the product speeds they offer.