Replication is a more powerful statement about the validity of research findings than peer review. Lots of valid research findings will not be replicated before they influence other researchers and the public. The point of this piece is that lay audiences shouldn't expect a simple "gold standard" by which they can distinguish the good research from the bad; understanding research requires critical thinking and access to domain expertise.

And there are also ways in which replication is orthogonal to peer review. Replication can't by itself tell you whether a piece of research makes a significant contribution to the field, or whether it is itself derivative, or poorly presented.