It reminded me of that game as well. The comeback was also due to some refereeing mistakes which lead to two penalties (one was deserved, the other was not). It was also due to silly defensive mistakes from Arsenal. It's exactly like Chelsea vs. United.
Coming back from 3-0 down isn't easy, especially at SB. Regardless of Webb's incompetence, Chelsea should have ended the game as soon as they had a comfortable lead. They let their guard down when they scored the third goal, and depended on their unorganized defense. After Rooney's first penalty, I knew a comeback is nearing. I guess that's why United will always have that 'character of a champion', and through that I am sure they can win the title this year.