1. 9.1 was not beta and was laggy.1. Beta
2. Beta
3. Not laggy for me
4. Always wait for update
5. Are you guys actually reporting your issues? Every hiccups I mention in the Feedback Assistant or Bug Reporter gets fixed in the next build. Maybe you should help them out.
2. 9.1 was not beta and was laggy.
3. Good for you, the >5 devices I've tested + all 6s devices in the Apple Store were laggy. Having seen all those devices perform the way they do, your comment doesn't do anything other than confirm my thesis that some people are just less critical than others.
4. Agreed, you should never update because Apple generally makes devices perform worse, not better.
5. Yes.