How do you get that? Massachusetts's average is 13.5 Mbps. Japan is 12.8. New Jersey, Maryland, and Delaware are 12 and up, above Switzerland, Sweden, Czech Republic, etc. The dense U.S. states compare very favorably to the top-5.
South Korea is the outlier because half the country lives in a single megacity with the density of San Francisco. The U.S. can't compete with that geographic advantage.
South Korea is the outlier because half the country lives in a single megacity with the density of San Francisco. The U.S. can't compete with that geographic advantage.