4G in the US often matches the parent's reference speeds, it depends on where you're at. People often make poor comparisons with the US, they context drop, comparing eg the speed across the entire US or a state versus their experience in one large city in a smaller more densely populated country (and then cherry picking based on a good outcome).
Cleveland, Minneapolis, Detroit, NYC, Boston, Pittsburgh, Cincinnati, Baltimore are the best in the US, averaging at or above 30mbps across the cities in question. SF, Philly, Atlanta, Kansas City were also competitive with what the parent referenced (eg the SF avg was 27mbps, meaning people are routinely seeing the parent's ~40mbps in Birmingham).
