Well, since some of the BSD folks publicly stated that they’d ignore any embargo, that seems like a pretty predictable consequence. And in this case I understand that it took a while to develop workable mitigations. Immediate disclosure might have caused great harm.
Tarring all of the BSDs with the same brush is wrong, both in general and here specifically. There's also the matter of both Matthew Dillon and Theo de Raadt discussing this topic months or even years before Google Project Zero made its discovery.
Moreover, the OpenBSD people have made some remarks about how it was commentaries in Linux patches and discussions on LWN that actually let the cat out of the bag this time.
> Tarring all of the BSDs with the same brush is wrong, both in general and here specifically.
Is that actually being done? The FreeBSD team got notified (late), the DragonFlyBSD, OpenBSD, NetBSD teams did not get notified. Matt, of course, seems to have a patch already.