I don't see how you could interpret last night's efforts as a "defensive attitude". We had far more shots than them, and 5 on target as opposed to their one. We also had two (or three) good penalty shouts turned down, one of which was in front of me in the first half and looked pretty nailed on.
Derby were good last night, but so were we. If things had gone differently in terms of penalties being given, not given etc, it could have been 4-0.
They had one - just one - shot on target, which was a needlessly given away penalty. They were impressive, but they were also lucky.