Twitter 'will be more valuable than Facebook' Rory Sutherland, the vice-chairman of Ogilvy & Mather who helped to turn Microsoft into a major consumer brand in the Eighties, said although Facebook might be the most popular social network at the moment, it could struggle to maintain that position. "I can see Facebook being superseded more easily than Twitter being superseded," he said. As a forum for outbursts, Twitter's [character] limit, its haiku element is very appealing. I wouldn't bet against it being more valuable [than Facebook] in the long term. Mr Sutherland's comments come as Facebook is gearing up for the largest initial public offering the technology sector has ever seen. The social network founded by Mark Zuckerberg aims to raise $5bn (£3.1bn) on May 18, valuing the company at $96bn. As Facebook embarked on its investor roadshow yesterday, it made clear that it was now investing heavily in services like mobiles in order to reap benefits in the long term. Twitter, which allows users to post messages 140 characters long, is growing rapidly in metropolitan areas but has struggled to make money out of advertising. However, Mr Sutherland said its "potential for making money is higher than anyone realises."