Google does pin their keys in Chrome though, so they know if there is a MITM (and they have, Chrome's certificate pinning led to DigiNotar's downfall). It's a n

Google does pin their keys in Chrome though, so they know if there is a MITM (and they have, Chrome's certificate pinning led to DigiNotar's downfall). It's a non-scalable hack, but definitely a good one for the largest search engine and a leading email provider to be able to provide.