Yes the exact experience on XS 256gb. Thought it had something to do with restoring my iOS 11 backup from my X to the XS.
Restored the XS today and set it up as new, yet it showed the same performance dip. Experienced micro-stutter while typing too. It doesn't have anything to do with Intel is what I feel, instead it's with the optimising of iOS 12 for XS.
On updating to iOS 12.0.1 I've noticed a lag in Face ID too.
Really gutted thinking making this switch to XS from X would've given me the smoothest iOS experience.
Hi all,
My X was brilliant, but slowed up with iOS12
I’d get terrible lag just selecting a photo to send; you could almost count up to 20 before the iMessage app opened.
Then, my X stopped working. Lost all mobile data. Just a black triangle with an exclamation mark in the top right hand of the display.
There was no repair and an Apple retail store swapped it for a new one.
I don’t know if these things are connected, but totally full marks to Apple for a no-quibble swap.
My replacement X has no lag issues