Same, I'm on an iPhone 5 and the performance has definitely improved over 9.0. Swiping in the app switcher is smooth now, whereas it felt a bit "gritty" before.
I have had the same experience. I'm on an iPhone 5. It's too early to tell on battery but it's quick and smooth, especially on the app switcher, which on pb5 was stuttery. It's pleasant to use, and I don't feel like I'm making do until an update comes along anymore. The doubledown casino app still doesn't work, but it has never worked on any incarnation of ios9, lol