The aim of this paper is to replicate and extend recent treebank-based considerations regarding the syntactic structure of coordination. Overall, we confirm the previous results that, given the principle of Dependency Length Minimization, corpus data suggest that the structure of coordination is symmetric. While previous work was based on 2 English datasets, we extend the investigation to 3 more English datasets, 3 Polish datasets, and UD corpora for a number of diverse languages. The results confirm the symmetric structure of coordination, but they also make it possible to question some of the previous findings regarding the exact symmetric structure of coordination.