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We calculate the skewness (the third moment $S_3$) of matter distribution indynamical dark energy cosmologies. We pay particular attention to the impact ofdark energy perturbations on this quantity. There is indeed a clear signatureof dark energy perturbations on this quantity. By properly allowing dark energyperturbations we show that their impact on $S_3$ is strong enough (a factor$\sim 3$ greater) to easily discriminate between clustering and non-clusteringdark energy cosmologies. This indicates that high order statistics of thecosmic density field are useful to the study of dark energy models and arepotentially able to rule out clustering dark energy cosmologies.

Skewness of matter distribution in clustering dark energy cosmologies