Well, considering what is written on the homepage and what Rainer said in his press conference I think that must have been an historic bad outburst from Nalbandian if even Rainer is so shocked by what happened. Very very bad of Nalbandian acting like this
Sure you can get a warning for smashing a racket, nobody cares, maybe sometimes even a point penalty, but if you're still acting like that and this report sounds as if he was going completely nuts and crazy like a wild animal, then it's really very strange if you also get game penalties and when you are at brink of disqualification from the match. He also said that he delayed the game for several minutes.
Good for Nalbandian that the other matches scheduled on the Centre Court took too long so that his and Rainer's match have been moved to an outside court with no TV coverage
Or else lots of more people would have witnessed that