It has been a fact for a while now that if the competition is somewhat tight the judges will find the non-russian skater to be the winner and that is exactly what happened here. To win Russian skater needs to be by far better than anyone else and if they aren't clearly the best they aren't going to win. A sad fact that cost the gold for Boikova/Kozlovskii.
By the way Boikova/Kozlovskii PCS at the JGP final were 51.08 points while in here where there was a tight competition for gold their PCS were 49.53 points, about 1.6 points less. The Australian team beat their personal best PCS score by 4.5 points of course and also got about 1.5 points more than Boikova/Kozlovskii.