Cardiff manager Steve Morison: "We controlled the game without the ball really well and then when we got our moments we were spot on.
"To a man, we were top drawer. It was a good night. This was always bigger than Liverpool. There's a bigger picture to everything we do.
"We had fresh legs tonight and they were excellent. That performance shows where I want to take this football club and how this club looks on a weekly basis."
Peterborough manager Darren Ferguson: "I'm devastated. It was a humiliation and a complete embarrassment to the club. A performance of that level in a game of this magnitude will never, ever be acceptable.
"When you come into a game knowing Cardiff have lost nine games at home, and on the back of a performance last weekend that everyone agreed was a positive one, I cannot take one positive out of that performance, not one. I could have made about two subs after 20-25 minutes.
"It's not going to make much difference but I do have to apologise to the fans who came down to watch what was an unbelievable performance. It could have been 4-0 or 5-0 after 20 minutes."