This kind of thread generally piles up on rants of frustrated users, so here's another data (counter-)point: both are <1s for sure, possibly even less than 0.5s on my 6S w/ iOS 11, from a cold start. Everything is snappy and responsive, enough that I'd have to film this on slow mo and time it to be sure of any delay metric. Overall iOS 11 has been a solid performer for me ever since the second public beta.
Sorry for the misunderstanding, this wasn't aimed at you at all, I just responded to yours because you mentioned timings on a same gen device as mine and it seems mine is significantly faster. As for the rest, it's just that the sarcastic, conspiracist, passive-aggressive tone of many of the sibling comments is unnerving.
I bought a very expensive phone that was unable to launch apps (50% of the time, when it did, it took several seconds) and unable to make calls (the receiving end would be mute and would not hear what I was saying).
The phone was bought on an official apple store and had one day of use. Problems persisted for over a week. Tried all the possible solutions. The only one that worked was downgrading to 10.
