I just think we disagree on the overall definition of sybil attack. Creating 19 new accounts didn't give him extra influence in the network, because influence = stake, and their stake actually decreased from creating these new accounts.
If for you creating 20 puppet accounts is a sybil attack ... well then so be it, it won't be the first word that's butchered by laymen because of misunderstandings.
RE: Fact: Steemit Sybil Attacked the Steem Blockchain