Good quality? I'm not sure. Just speculation on this one post: https://www.hackread.com/brian-krebs-website-665-gbps-ddos-a...
130 karma · joined April 18, 2016
I'm a bit concerned about the reliability of that report since there are no strong proofs for their claim.
Again, the speculation that it is IoT devices is unfortunately just that. However massive compromise of internet connected embedded device is not new: http://internetcensus2012.bitbucket.org/paper.html