You should bear in mind that just because a person is a certain nationality does not mean they will be good or bad at an MA, it all depends on the individual.
I sure hope you don't get the wrong impression of the Koreans from this experience. They can be very good. I was trained once by a South Korean 5th Dan and his lesson was the toughest and most aggressive I've ever had the privellage of attending. His students had tremendous stamina and didn't break a sweat after 3 hours of training non-stop in full padding. Their kicks were far superior to ours and I learned a lot about what I was doing wrong in my technique from the encounter.
Also there is nothing wrong with viewing TKD as a sport, many people do. I do not meditate per se but I respect the history of our MA and the principles upon which it was created.