Balderdash. 99% of ALL companies are running just fine, thank you, on what we've got. Would we like it faster? Sure, but it isn't exactly stalling commerce. The repot writers need to check their bias at the door.
Call ATT and mention any of these and they will sell you a symmetric DSL rather than the less expensive ADSL. Cable and fiber have the same sort of tiered service. It's not simply a matter of speed, but of priority and throughput, to handle 2-way video.
The scale of internet infrastructure in the US is simply huge in camparison to S.Korea, with a much more diverse population to server, and a much more diverse local geography, weather, etc. It just simply is a more complex problem here.