Koreans are also crazy about archery, shooting and badminton, sports in which they generally go well.
*I used to live in "Bom Retiro" neighborhood in São Paulo which is a center of the Korean community here, they said me that exactly.
I don't deny that the Koreans do well in other sports, just that it's not like they have a cultural advantage or something. For example, their dominance in archery at the 2008 games was partially due to their building an exact replica of the Beijing archery range in Korea 2 years earlier and using it to practice. Many other competitors had never practiced on that archery range until they arrived at the Olympics, and it threw them off.
I'm not Korean and only said what members of the Brazilian-Korean community, in which I have a some friends, said to me.
The point is that national tallies can be thrown out by the internal medal-granting dynamics of sports.
If weightlifting still gave individual medals for the snatch and the clean & jerk as well as the total, it'd be even more noticeable.
They pointed out Korea tend to do well in per capita medal counts as Taekwondo is a popular sport there - and there are gold, silver and two bronze medals in four weight categories for two genders - a total of 32 medals available. On the other hand cricket, one of the most popular sports in India, has zero olympic medals.