Quinn Emanuel Urquhart & Sullivan has claimed success in an arbitration against its former clients, the founders of a website called ConnectU Inc., whom the firm represented in their suit against their Harvard classmate, Mark Zuckerberg, who started Facebook, for allegedly stealing the idea for the social networking site from them.

ConnectU’s founders had contended Quinn Emanuel committed malpractice by failing to obtain recent valuations of Facebook Inc.’s common stock before negotiating a settlement, resulting in a recovery that was smaller than they claim it should have been.