It is my opinion as I said, it's based on seeing players whose body language is negative and who do not appear to be playing to their full potential.
One example I would cite is Chris Humphrey and again this is my personal opinion, He seems to have lost a bit of his spark and seems to me not reading the game the same, where he was flying past players for fun before the ball would be played into space well in front of him and he would already be on the move, latterly he seems to be content to wait for the ball to feet before even setting off.
Tom Hateley does not seem to want to tackle anyone and appears lethargic and disinterested more often than not.
Like I say my opinion based on my perception at the games, I find the away games give me a different perspective as we tend to be behind the goal and have a better overview of the game.