Lambert said,: "When you get beaten you've always got to do your best to win the next one and I thought the lads responded really well to that setback.
"They've done that a lot since I've been here and I can't praise the lads high enough for the job they have done for me.
"I decided to freshen it up a bit because I have been using the same group week-in, week-out for some time now and it was good to give people like Wes (Hoolahan) and Korey (Smith) a rest.
"The lads who came in did a great job for me. It was an exceptional cross from Anthony McNamee for the goal and Grant (Holt) did well to pull the ball back for Simeon (Jackson) to score.
"Those are the best goals for strikers, when they knock it in from a few yards out, because it shows they've got themselves in the right place at the right time.
"I was delighted with the performance, especially with the way we defended.
"All in all it was a big performance after losing to Crystal Palace on Tuesday night and I couldn't be happier with the lads.
"You also have to remember that we were playing against a good side. I believe their position in the table is false. They have got good players, good resources, and it will be a good club to manage for whoever they bring in."
Middlesbrough caretaker manager Steve Agnew was disappointed Jackson's goal was not ruled out.
Agnew said: "My initial reaction was that the goal was offside - the lads certainly felt so too - but the pictures I've seen don't tell you anything so I can't really comment on that.
"It was certainly a disappointing time to concede because I thought we did well in the first half. We were hoping to go in level and take the game to Norwich in the second half but obviously their goal changed things.
"In the second half I thought we had a lot of controlled possession up to the 18-yard area but lacked any real penetration once we got there.
"I told the lads that if they kept passing and moving an opportunity would come their way and sure enough we created one right at the end.
"Unfortunately for us Scott McDonald's shot was just wide. That was our big chance. Overall I didn't think we deserved to lose the game and it's very disappointing, just as it was at Forest in midweek.
"It's been a really hectic week and I've enjoyed a lot of it, apart from the results of course."