It seems like many of the early problems associated with iOS 9.0 have been addressed and 9.1 is running really smoothly. @robertk328 was able to type that entire message on one battery charge.
There are a lot of people still having issues with 9.1. I didn't have any; but I make sure that I do my updates via iTunes and not OTA to avoid any hiccups.
As it does for most users ...
Apple from time to will release a "Special" crappy version of iOS to users that typically like to focus on non-issues, and just like to complain in general, while the rest of us receive the "Standard" version of iOS that mostly has no issues and life goes on ...