> I'm not entirely clear on whether CoT@32 uses the 5-shot examples or not, though; it might be 0-shot?

Chain of Thought prompting, as defined in the paper referenced, is a modification of few-shot prompting where the example q/a pairs used have chain-of-thought style reasoning included as well as the question and answer, so I don't think that, if they were using a 0-shot method (even if designed to elicit CoT-style output) they would call it Chain of Thought and reference that paper.