I can press home button once to go to app switcher. This happens occasionally though.As much as I'd like it to be, I'm confident the delay is not a result of the indexing. It's too consistent to not be intentional.
Can anyone with a non 3DTouch device confirm it's there for them? I've often found myself accidentally landing on the home screen when I don't double click quite right, but it's a non issue generally as I'll use the 3DTouch shortcut instead.