I'm not sure what your question is getting at. What do you mean by elite? Do you mean proliferated multiple styles, or produces high quality martial artists?
I would probably have to say no though. Most of Korea's proliferation of martial arts is recent as opposed to say Koryu in Japan or Gung Fu in China. I do think, however, that Korea can produce good/great martial artists.
Korean martial arts generally excel at teaching hard striking methods. They come up short in teaching the healing arts along with more 'sophisticated' methods of striking power compared with many Chinese systems. Of course, it can be difficult in the West to find someone with the knowledge I refer to who is willing to teach it...
What I mean is producing the best possible Martial artist though training methods, so is that enough to be consider an elite country for MA training. You know Japan China and a few others have elite status when it comes to training.
I think it really comes down to the teachers that you have in an art.
You could have a great art from china or japan or korea or anywhere.
And if the teachers do not do there job then you can see the end product.
But then again it also depends on the person training in the art.
You only get what you put into it, and with this fast food world very few put in that kind of work.
And before I get flamed for it. It is just my thought and mine alone.
I am not sure what you are asking, but if you look at it objectively, Korea has produced many many champions in both TKD and judo. But the bottom line is always that it is the practitioner, not the art.
i believe we should take into consideration which century you could pick from. So many great warriors have come and gone thru the ages from all countries. In todays world of multicultural society, martial styles are blended very few schools teach a true original line of traditional style of any kind . other than maybe kung fu and it has been commercialized some what also for americans. imho