I can confirm iOS 9 GM stutters on my 6+ when opening and using the app switcher.
Hi,
Can you confirm what the experience is like on your iPhone 6 Plus using safari for surfing , reading and sending eMails ,sending texts and making phone calls.
Lag from opening up apps and opening up the switcher or control centre are background worries for me.
I'm at this time a little more interested in using the phone as above.