Netizen

But you knew that.

A Master of Improv, Writing Twitter’s Script

Mr. Dorsey’s role has since been reduced after employees complained that he was difficult to work with and repeatedly changed his mind about product directions. He no longer has anyone directly reporting to him, although he is still involved in strategic decisions.

Mr. Dorsey declined to comment on how people feel about working with him. But, in a statement, he said he considered Mr. Costolo to be one of Twitter’s founders. “He’s had a dramatic impact on the company and the culture,” Mr. Dorsey said. “He’s questioned everything we started with and made it better.”

Mr. Costolo says he looks to Mr. Dorsey for ideas and sometimes has to pull them out of him. Although Mr. Dorsey is a regular on the media circuit, appearing on CNN, as well as “Charlie Rose” and other programs, he tends to be quiet in meetings.