Is Twitter considering replicating Facebook by applying an algorithm to results, rather than listing all tweets in chronological order? CEO Dick Costolo responded to questioning on the site's Q2 results by keeping the door open. "I think it's fair to say that we are not ruling out any kinds of changes that we might deliver in the product, in service to bridging that gap between signing up for Twitter and receiving immediate value... you will see a number of kinds of experiments that we produce there."