Don't get me wrong; I think the article is very unfair and awful in many ways. I just thought that particular counter-argument wasn't valid. I think their point about ETC can't really be compared to the Bitcoin community splinters, since the point is about the DAO hack rollback. The block size debates were very controversial and heated, but not to the degree of the DAO hack incident.
Ethereum is the cryptocurrency I personally like the most, but I do find supporters tend to downplay just how controversial that incident was.