"given enough eyeballs, all bugs are shallow" is a compliment to open source, and telling your users that you use open source is a positive reassurance on other dimensions as well; it's relevant, and the truth is always relevant; there's no harm in mentioning it.
"Release early, release often" and "move fast and break things" are respected ideas that diminish the importance of QA. The more effective and efficient any QA you do is, yes, very valuable, and QA that finds broken things, all the better. But don't move slow is an OK compromise.
"Release early, release often" and "move fast and break things" are respected ideas that diminish the importance of QA. The more effective and efficient any QA you do is, yes, very valuable, and QA that finds broken things, all the better. But don't move slow is an OK compromise.