I've noticed that, outside the top 3, PCS scores are heavily dependent upon how well the skaters skate. The top 3 always get good PCS whether or not they have falls or other mistakes, while the other skaters will get good PCS only if they are clean. It seems there are about 8-10 skaters who have the potential to get the 4th highest PCS marks in Sochi, but I wish the top 3 skaters would also have the same variability in their marks as well.
At 2013 World, In FS, Li had clean program(what only kim and Li did at that night) and her TES was the highest except Yuna.
but she did not got 4th highest PCS as your claim, not even closed to that, her PCS rank was 10th.. She got the lowest PCS in Top Ten.
And, These youngsters were 2 points ahead of her , Gracie with minor errors / Adelina with 2 UR and even Ketyln who had messed program, include two falls.
Judges did not gave PCS scores, in heavily dependent on how well the skaters skate at all. This is not an opinion, It is fact.