I thought Paul Kent made an interesting point on NRL 360.
He brought up Gould in the '03 series. During a video session Gould showed Hodgson's try from the scrum in the '02 series. QLD pushed in the scrum to the point that it twisted and the backrowers breaking off were on the opposite of Hodgson and that's why he scored the try. He showed them QLD's desire to keep playing on despite the fact that they had no chance of winning the game.
Then he fast forwards to Wednesday night, the Jennings try. He pointed out 4 players that were so desperate to get across to stop the try, which they thought was going to be in the corner, that they overran it and that's why Jennings scored.
He then goes on to say that until NSW show that kind of desire, they will never get the upper hand on QLD.
They showed that desire in 2014, but they didn't before then, and they didn't after.