That article is not about Afghanistan but Pakistan.
The actual nature of wikileaks's leaks has turned out to be so prosaic that it hasn't really changed anything. Apparently diplomats bitch about things. Whoop de fricking doo.
edit: Wait, I forgot about the Kenya thing, of which Assange claims "1,300 people were eventually killed, and 350,000 were displaced. That was a result of our leak."