Yes. The methodology in the original D&K is quite shoddy, and vulnerable to e.g. good old regression to the mean, and the interpretations are too strong. This is sadly very common in psychology (and many other fields I'd guess) and even researchers don't care so much if the story is juicy enough.

The pop version of the DK effect seems to be something like a 4-3-2-1 ranking, which is obviously not supported by the data.