Just received an updated statement from cogent support: "We appreciate your concerns. This is a known issue that originates with Google as it is up to their discretion as to how they announce routes to us v4 or v6.
Once again, apologies for any inconvenience." And: "The SLA does not cover route transit beyond our network. We cannot route to IPs that are not announced to us by the IP owner, directly or through a network peer."
