No, it isn't. The article is claiming that the D-K effect doesn't actually exist; actually all that is going on is "autocorrelation". That claim is wrong. The D-K effect does exist, but it isn't what D-K said it was: it's not that there is an inverse correlation between perceived skill and actual skill; it is that there is no correlation (or at best a weak positive correlation) between perceived skill and actual skill (when we would intuitively expect a fairly strong positive correlation between them). That is what D-K's actual data shows; but neither D-K themselves in their paper, nor this article, correctly describe that.