NYTimes.com increased its monthly unique visitors in the U.S. by 2.3 percent from September 2010 to September 2011, Jim Roberts, assistant managing editor for digital, said at the World Editors Forum in Vienna. Such growth (up to 34 million uniques) was “incredibly surprising” given that the paper launched its metered access plan in March, Roberts said. He also told the forum that the digital subscription plan has made Times journalists feel a greater stake in the digital products. “People seem a little more willing to work on a piece of video, file early for the Web, etc. There is an overall feeling we’re creating a digital product that has value.” Journalism.co.uk writer Rachel McAthy has more details and an audio interview with Roberts. || Earlier: Why the New York Times created leaks in its paywall during Hurricane Irene | Why would anyone pay to read The New York Times online?