I meant shutter release lag. Still, with both devices locked, the time from pick up to first shot won’t be that much different.

I’d rather have my Nikon, but I wouldn’t be in troubled if I needed a quick shot and only had my iPhone.

What do you mean locked? I can go from powered off to shooting my Canon in a fraction of the time than my iPhone from locked. And importantly a good photo because I can zoom and frame while the camera is getting the software ready.

Where the iPhone wins is when it’s already in my hands.

I don't have an X, bit my SE unlocks (fingerprint) in less than a second.

Also, you don't even need to. You can swipe from the bottom and pick the camera app from control center.

It's probably 1.5/2s from screen off to photo taken

I have an iPhone 7. I’ve never quite gotten the gesture right in the moment. It feels like it has some degree of spurious input rejection on the unlock screen.