At Trophy Bombard 2009 Yu-na got PCS scores of 66.40. At the Vancover Olympics Kim got 71.76. That's pretty big PCS boost don't you think. What about Hanyu's PCS boost in the last two months, and he wasn't even skating at home!
Hey let's talk about Gracie Gold. 61.89 in the Team event. Final here with a fall and much worse skate 68.33
At the Olympic games or the World Championships. Everyone gets higher PCS and PCS boost. You make the final group at a Worlds or Olympics. Then you establish yourself as a top skater in the sport, and guess what your getting a PCS boost.
That goes for ever skater. Sotnikova's been scoring huge or that short program. Young up and coming skaters, almost always get big pc boosts. I espect Polina Edmunds, to have PCS increasing very quickly.
A lot of times its not so much that they got better but rather that they were underscored before.