To be fair, we shouldn't have to wait for an update to make Apple software run smoothly on a premium Apple device. It should be completely smooth from day one.
I wouldn't expect anything less TBH.
I have yet to set my XS Max up (coming from an X) and if mine is not smooth after a few days of use I will be returning mine too! I didn't pay this much for a stuttering device and having to wait an unknown length of time in the hope the next update will make it run as it should have from day one. Even then, an update wont guarantee a fix....