Open Signal users reached average speeds of ~230 Mbps on Korea's 5G, consistent with similar networks in other countries. I was surprised when Korean government testing showed much higher speeds, often over 600 Mbps. I normally wouldn't pass on anomalous results like that unless I had an explanation. However, it's an official source and none of the other testing is conclusive,
Perhaps more interesting is the lower chart below, showing the three telcos felt they had to match each other's deployments. They provide an important lesson to regulators: never subsidize all 5G carriers. Find a way to get one to build and the others will probably follow, if they all have mid-band spectrum.
ZDNet reports, "The government made measurements in 11,000 crowded areas such as department stores, libraries, universities, amusement parks, hospitals, exhibition centres, subways, and terminals."