Earlier quoted context omitted.
The FCC requires ISPs to publish information about their network management practices. That's how you get sites like this: https://www.xfinity.com/networkmanagement I do wish this was required to be easily accessible from the marketing pages. Usually it takes some digging to find it. But at least they do have to make these numbers public.
>The FCC determined that Comcast’s Xfinity Internet broadband Internet access services deliver, on average, over 100 percent of their advertised downstream and upstream speeds during the busiest periods of the day, known as "peak" times, during sustained testing. Peak times are Monday through Friday from 7:00pm to 11:00pm local time. >Latency is typically measured in milliseconds, and generally has no significant imp…
They are god awful expensive, but I feel the quality of their product is excellent. And I'm not even a Comcast employee or shill.