Re: Do what I've done
Researched; iOS 9 nags you to update to newer iOS 9s a lot more than pre-9 nags. That's probably the reason for the disparity in anecdotes.
Definitely the iOS 9.3 & 9.3.1 updates nag nag nag. I'm getting the update nag about once a day on my iPad2, what is strange is that the Air2, which also hasn't been updated isn't displaying the nag's...