Source: http://www.theguardian.com/technology/20...

Costolo argued that Twitter had stuck to a “cohesive long-term strategy” and said there were plans to make the service more accessible during live events, whether sporting finals or breaking news.

He referenced Lightning, a new set of features intended to enable better curation and promotion of live content on Twitter. “People have been asking why I didn’t do that four years ago,” he said. “Four years ago, the site didn’t even stay up. We were the only big site on the internet whose 404 [error message] was its own brand – the fail whale.”

In Costolo’s five years as chief executive, Twitter has transformed from a private company with 300 staff valued at $3.7bn to a public company with 3,900 employees valued at $23.5bn.