Why Did WikiLeaks Have Such Little Impact?

A few months back, hundreds of thousands of pages of U.S. government documents were made available to the public through WikiLeaks. I have to say that, at the time, I thought this would be a history-making event. I figured there would be loads of interesting and controversial revelations in the documents. Huge scandals would emerge; heads would roll.

Photo: Abode of Chaos

I was recently reminded, while reading a months-old copy of The Economist, just how little of interest has thus far emerged from the documents. The U.S. ambassador to Ecuador was sent home by the Ecuadorians because she had written a leaked cable saying (gasp) that the Ecuadorian police were corrupt. The article mentioned that a similar fate had befallen the American ambassador to Mexico.
Is that it? Is there nothing of importance in State Department cables?