So far I think there's two sides to it.
The players heads haven't dropped after going a goal down or making a mistake...there hasn't been that negativity from the stands. "Garbage Wednesday, come an sit up eer wi me" etc.
On the other hand I think the team have missed that feeling of the Kop 'sucking' the ball in. That roar that goes up when we put pressure on, win a corner etc.