I'd like to ask researchers a question, but figured it probably doesn't necessitate a separate post: to what extent it's acceptable to quote or discuss feedback from peer review with people who weren't involved with the paper? Answers I got from folks at the institute varied enough to make me want a larger sample. b_b, mk, am_Unition, Cumol, johan (and anyone else, just going from the top of my head). In other news, this week I tried exercising like I used to (minus running) for the first in almost a year, and it's pretty poor performance-wise, BUT: I stop because my muscles can't handle more, not because my heart is about to quit. Feels incredible.
So the fact of discussing peer review is not a problem. The reviews are confidential to protect you, not to protect them. The only issue I could see is if the information was confidential, so your collaborators wouldn't want you to discuss the findings and critiques until it's published. It's 100% up to your what you're comfortable sharing with others.
Having gone through peer review exactly once now, I'm puzzled as to why anyone would care if you'd share it? You don't know who wrote it, so you can't properly take their wishes into account. And if it's a small field and the reviewer does find out you've quoted whatever they said to someone else, they should stand behind their words because that's the purpose of a peer review.