RFC 3627 is informational RFC. Does not describe any strict rules. Read the RFC and understand /127 is harmful only in certain cases: poin-to-point link + usage of subnet anycast. Other problems might exist as described in section 5.
Chaos is harmful. Following consistent best practice on peering links is a good idea.
http://www.ietf.org/id/draft-kohno-ipv6-prefixlen-p2p-00.txt
Yes, perhaps saying that /64 on all peering links is a bit too simplistic. Nevertheless, I do believe that everyone should follow best practice on peering links. This WG seems like a good place to agree on the specifics of what that best practice is since RFC 3627 is a bit too general for this. What do others think of drafting an IPv6 best practices document in this WG that is specifically for network operators? --Michael Dillon