I didn't know this (from Armed and Dangerous):
Punctuation marks originated from notations used to mark pauses for breath in oral recitations, but 17-to-19th-century grammarians tied them ever more tightly to grammar. There remains a minority position that language pedants call “elocutionary” - that punctuation is properly viewed as markers of speech cadence and intonation. Top-flight copy editors know this: the best one I ever worked with was a syntactic punctuationist on her own hook who noted that I’m an elocutionary punctuationist and then copy-edited in my preferred style rather than hers. (That, my friends, is real professionalism.)
I think our blog punctuation style is elocutionary.