[Yrlec]

I asked Google's support team the same thing regarding the SLA not including situations when the system would not be responding to any requests at all. This was there response: "please understand that these SLA's are meant to cover backend issues on our end. In your scenario, we would have no control over our DNS server getting hacked. I apologize if there was confusion caused."

So Google claims that it does not have control over its own DNS servers and is therefore not to blame if the DNS is pointing to the wrong IP. Not very reassuring.