Good article, but DPOS consensus algorithm is arguably more decentralized than POW used by Bitcoin, since a handful of pools effectively control the Bitcoin network, while in DPOS number of elected block producers is usually set higher.
More info on DPOS here:
https://bitshares.org/technology/delegated-proof-of-stake-consensus/
RE: A Primer on EOS, why it grew 320% overnight and why it isn't done yet!