I challenge that most could learn to read and write Korean within 15 minutes [0]. At most, stumbling over some of the vowels. It really is a marvelously simple language. Of course - reading it at speed will still take more practice but I feel one could become quite proficient at reading (without any comprehension of what they are reading) within a few weeks of practice.
[0] http://www.ryanestrada.com/learntoreadkoreanin15minutes/