This variable was new to me when I saw it mentioned last week, so I turned it on, but either it doesn't work or I'm doing something wrong.
My steps: In Org source tree, `make repro`. In Emacs: `M-: (setq org-fontify-quote-and-verse-blocks t) RET` Create a temporary Org file like this: #+begin_quote This is a quote. #+end_quote Put pointer inside the quote block and run `M-x describe-text-properties`. It says that the face is org-block, not org-quote as expected: There are text properties here: face (org-block) Bill -- William Denton https://www.miskatonic.org/ Librarian, artist and licensed private investigator. Toronto, Canada