Stand-in captain Nick Easter admitted: "Ireland were the better team. We were second best from the get go.
"We won the kick-off and I think that's about the only time we were on top. We were playing catch-up in the second half but it was the first 20 minutes that really killed us.
"We had a lack of urgency and lack of discipline at times and unfortunately we didn't deliver on the day.
"They played very well and we didn't execute well, but it's a young team, we've got to learn from it and learn pretty quick.
"Next time we'll be tested will be in the World Cup, so we'll find out a lot more then."
Easter said that winning the title did not make up for failing to complete what would have been a first Grand Slam for England since 2003, adding that he did want to seem "ungracious" that he was disappointed.
England were second best - Easter
"We missed out on the big one but this gives us some sort of reward for the strides we've made this season," he added.
England flanker James Haskell and fly-half Toby Flood could not hide their disappointment.
Haskell said: "I am bitterly disappointed. You play four games and then lose the last one. Whatever happens about the title it takes the edge off eight weeks of hard work.
"We were our own worst enemies today. If you shoot yourself in the foot every play it makes it 10 times worse."
Flood added: " "You go into every competition to try and win it and we are in a better position than we have been in recent years.
"But it is a huge disappointment we weren't able to finish it off - and we weren't even close to doing it. They hammered us."
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