With the interesting revelation of private fiber being tapped, I'd expect more companies to start encrypting if they haven't already. Google was sending information over unsecured circuits without encryption.
I'd expect Microsoft and others will make an announcement. With MS's overly zealous security handling these days, I'd be slightly surprised to find out that they were transmitting in the clear outside their datacenter.
If there were actual taps _inside_ the datacenters, like on top of racks and so on, that'd be quite the spectacle.