For all the talk about change, corporate counsel are finding it hard to believe that outside firms are serious about rethinking their approach to client service and billing. In a survey by Altman Weil, 75 percent of the responding chief legal officers rated their law firms between zero to four on a 10-point scale, indicating their opinion that firms had little or no interest in change. "This is a dramatic vote of no confidence from chief legal officers," Altman Weil Principal Daniel J. DiLucchio Jr. said.