You would actually be hard pressed to find more than just a few high progression parses using DoC. It is used, and viable, but certainly not the go-to choice.
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For reference, I found maybe 1 out 25 parses for Kromog using DoC. And out of the 8 druids to log mythic Maidens (a long fight where you would anticipate DoC potentially), only 2 used DoC, or 25%. HotW is the most common choice @ ~65%.