The true position of GMaxwell and his dislike of Darkcoin is as follows:
Yea, well the darkcoin thing was pretty offensive to me in general, I feel that it commercially exploited my work promoting coinjoin itself not so bad, but it was frustrating that it was also stupid: the attraction of coinjoin for all its limitations is that you don't need a new coin, it's already just part of Bitcoin. I've been continually disappointed by the level of hype around Zero*, especially when it comes at the expense of attention to other techniques which are very interesting themselves.
Obviously, Gmaxwell feels he wasn't properly acknowledged for his coinmixing work and he defends it by saying that CoinJoin is already part of Bitcoin. I beg to differ. CoinJoin is an add on. Moreover, masternodes perform coin mixing via a decentralised network of hundreds of masternodes, chosen at random.
It is CoinJoin but using a server chosen at random.