Last week, Ed Miliband, who wants to be Britain’s prime minister, had the kind of public event that changed people’s, or at least the media’s, perception of him: He was punchy, sharp, raspingly dismissive of the government’s strategy. The Labour Party leader, in his speech to the party’s annual conference, spoke for over an hour without notes, moved about the stage with apparent ease, and seemed in a fine, combative humor. He got good press, which he generally hasn’t for the first year of his leadership. It didn’t have quite the earth-moving quality of Mitt Romney’s steamrollering of President Obama a day later – another, and much greater, turnaround event for the man who wants the somewhat larger job of U.S. president. But Miliband did good.