"This was one of those happy Saturdays when everything you have done in the week works out the way you want it," PA quotes McClaren as saying. "There were times when it was simply beautiful to watch.
"We had to earn the right to play our football by standing up to a side we knew would be direct and physical and once we established our superiority we were terrific.
"The quality of the football for the second and third goals was fabulous and it all stemmed from having the right balance and attitude."
Derby are ninth in the Championship.