Peer review is a tenet of the Scientific Method? I don't think so. Independent replication definitely has been considered so: https://en.wikipedia.org/wiki/Nullius_in_verba

I guess that could be considered a specific type of peer review. Getting useful feedback is always good too, whether related to science or not. Maybe of interest:

http://michaelnielsen.org/blog/three-myths-about-scientific-...