For interest only as it doesn't add to our understanding or fix the issue but does demonstrate how widespread it is:
i was in a meeting at a global technology company when the conversation turned to email. One of the engineers mentioned he was having trouble With his iPhone. I asked if perhaps he had encountered the dreaded phrase "This message has not been downloaded from the server." immediately the rest of the meeting erupts - my wife's iPad, my iPhone too, my kids iPhones/iPads. It was big audience 20-30 and it was 60% of the iOS users. In the end I flashed this thread up on the screen and put the feedback page and thread links in an email to all those affected. There was a lot of anger And obviously mocking from all the android drones.
what was really interesting was that a bunch of highly educated and technically competent engineers hadn't done any real fault finding, searched for this thread or thought to post feedback to Apple. ladies and gentlemen, we represent the proactive tip of a big iceberg (in the uk at least). It's worth checking if you encounter similar opportunities and recruiting more users to provide feedback.
COngratulate yourselves on taking action to become the informed and interested minority.