Experts say that coupled with the U.S. Supreme Court ruling in Stolt-Nielsen SA v. AnimalFeeds International Corp., the Court's decision in AT&T Mobility LLC v. Concepcion comes as a strong statement against class arbitration.

"The combination of this decision and the Stolt-Nielsen case, which is referenced in the opinion, will largely be the end of class arbitration," said Alan S. Kaplinsky, Chair of the Consumer Financial Services Group at Ballard Spahr. "We won't see very much of it anymore."