Given the recent significant increase in DDOS attacks around the world, the statistics from this article should not be surprising. Take these stats into consideration as you plan your defensive posture and educate your end users.
This info concerning the Dyn attack was to be expected. Attacks associated with large IoT botnet farms are only going to increase in the immediate future given the effectiveness demonstrated in the DDOS attack against Brian Krebs. For the foreseeable future, this will be a defensive struggle simply because patching options for the IoT devices in question are largely non-existent.
The technical geek side of me finds this innovative command communication technique ingenious. The IT Security side of me is concerned about this latest evolution in the command/control process and its affect on admins attempting to limit this type of communication. It can and will hamper filtering efforts at the DNS level.