User stories are used to describe the functionality delivered in a product or system. Planning Poker is a common technique for sizing user stories, however it has challenges. It can be time consuming and teams can get bogged down in unnecessary discussion. The talk and paper accompanying this presentation describes a technique called Silent Grouping that can be used to compliment Planning Poker, explaining how to apply it so that large sets of user stories can be sized in minutes. These are slides from a talk I gave at XP2011 in Madrid. However, at the talk I did not actually use slides. Instead, I got participants to play the Silent Grouping game and we had a discussion about it. Silent Grouping has several advantages. It is fast, which in turn leads to significant time and cost savings. It also has more subtle benefits. The paper, available in the XP2011 conference proceedings, discusses the techniques, challenges, cost savings and benefits of Silent Grouping.