I don't know why people were expecting instant results. AFL is like formula 1 in some respects. You can have the best driver in the world in the car but if the car is 3 seconds a lap slower than the fastest cars out there that driver isn't going to be able to do anything. Clarkson or Thompson could be coaching the Demons right now and it would not make them any better. Where Roos will prove his worth is over the long term.