Nope, that's not how it works. Some other issue will be found and used to retroactively justify the vitriol. It wasn't misplaced, just mistimed.
So it was just nastiness waiting for a made up justification.
There have been plenty of other bugs that have caused issues with our system, hence the "jumping to conclusions".
On the plus side, the client does appear to be getting better, and the team working on it really care about the quality of their work, so I have high hopes for OS X Mail!