Kim's performance was *technically* and *athletically* one of the best in Olympic skating history. (And, she still maintained her natural sense of grace and artistic expression.) Her routine was much higher in difficulty level and tougher in required technical execution than the routines the Americans skated--than routines that are normally skated in general. Kim is a skater of unique skill and abilities. She's apparently "set three world records over the course of two days."
This year the American team just didn't have didn't have skaters at the level of superstar legends such as Michelle Kwan, for example.
Love figure skating. God created humans to do some incredible things. Yuna, and all the skating greats are just such a pleasure to watch.