I think he meant he never encountered the MAJOR iOS 9 bug which left many people "Stranded" with a dead phone on the slide to upgrade screen
Other than some minor animation issues, iOS 9 is solid here and much better than iOS 8 ever was in my experience.
Since you base just about everything on fluidity, you'll most probably always be disappointed. I hope the next build brings you the perfection you seek, but I doubt it.