Here's A Brutal Quote About Twitter CEO Dick Costolo From A VC Who Owns Shares In Twitter (TWTR)

Sarah Frier and Brad Stone at Bloomberg Businessweek have a short story about Twitter's new head of product, Daniel Graf. In their story, there's a pretty brutal quote about CEO Dick Costolo from Brian O'Malley, a partner at venture capital firm Accel Partners, which owns Twitter shares.  Frier and Stone say that Graf's biggest challenge may be working with CEO Dick Costolo. They note that Twitter has gone through some executive drama this year with COO Ali Rowghani leaving the company this yea...