User blog comment:Etindel/That did NOT just happen!/@comment-89.154.212.20-20130603141758/@comment-121.222.178.208-20130604002746

In the books it's noticed by everyone, including House Frey's new allies in King's Landing - it's implied that having broken the vow has caused Walder Frey a number of problems both inside and outside his house by the end of book five. It's a near-sacred tradition and rarely, if ever, broken before.