We are exam-oriented. If we learn more words, our spoken English will be poor.
Therefore, Korean students' living English is better, but their reading and writing ability is not as good as that of China students, because they have not learned some difficult words.
However, even if MSN chats well with you, the Korean girl you meet may not be good at English. Maybe she has a good electronic dictionary with her. Hehe, don't be hit by this.
Anyway, according to my experience in Korea, the average English level of Korean young people is similar to that of our country.
And the pronunciation of Korean English is more strange than Chinglish. It often happens that Koreans speak English fluently, but foreigners in Europe and America don't understand a word.