My first four came right from the kennel and it is fun to teach them about how to be a pet in a home environment and watch them learn about stairs, doors, windows, furniture and soft beds, etc. It really didn't take them long to get the hang of a schedule or potty routine.
My last three had been fostered and it was somewhat easier as far as learning all of the basic stuff, but they all transitioned into the household quickly regardless of whether they had been fostered or not.