Not at all. That's actually the crux of my argument that this is promotional.
Google, Microsoft, and Facebook all collaboratively met at an event outside defcon this year called bountycraft. In it, they shared their practices handling vulnerability disclosure and other related events. All three have arguably the best secure development lifecycles in tech right now. All three are intimately aware of each other's practices.
Microsoft is assuredly fixing this into overtime. Microsoft assuredly knew this was in use in the wild. They're already working beyond full speed, and Microsoft has a history of sharing mitigations with third party security vendors. Given the relationship I described above, Google certainly knows all of this and knows that Microsoft won't be able to act any faster to handle this.
No one is served well by this disclosure except for two parties:
· Unprivy malware authors (the vast majority) who are now actively researching this disclosure.
· Google, by convincing users to use their browser for protection.
This was a marketing play.