Saw them play the Russians earlier today, and here are some thoughts on them:
The first five minutes they were kind of out of their depth, perhaps a little overwhelmed playing a team like Russia. The game was entirely in the Korean end at that point. However the Koreans woke up and started competing, and it was 2-1 after the first, a rather close game. They continued to hold their own in the second, though gave up a powerplay goal that may have killed their momentum. Dalton, the Korean goalie, did a real good job keeping the Koreans alive, while Shin Sang Woo (19) is easily the best native Korean on the team. He is likely to be their biggest scoring threat outside of the naturalised guys.
The third period is when the difference in skill really showed. The Koreans were just out of it, probably not used to keeping that high of pace for so long. Russia got 4 goals, and really opened it up. They also did two 5 minute overtimes (3v3 and then 4v4), and a shootout, just to show off for the fans, and the Koreans won all three of those, and really excelled during the overtime portions.
If they can maintain their game for 60 minutes, the Koreans should at least be competitive for the Olympics. They are determined, and in a tournament like this anything is possible.