In any real sense with respect to weather and wind power systems, electricity does not take time to move.
I did not say it was a delay issue I said it was a capacity issue. Say the western portion of the grid is over producing and the eastern portion is under producing. There must be enough transmission capacity in the form of electrical wires to be able to transport the electricity from the west to the east. With PVs this could happen every night as the sun goes down.
Even on a neighbourhood level it can be a problem. Say a neighbourhood goes heavily into solar. At noon they could produce much more electricity than they use. Now instead of drawing electricity, like the local connection was designed for, it area is trying to inject a large amount of electricity into the system which could overload the local transformers and switched. Hawaii is quite concerned that this is a problem.