I’m seeing very few iOS 12 bugs being reported on Twitter. This is very unlike past releases.
Also, despite some benchmarks coming out lower, most people are either perceiving a speed increase in actual use or at least not noticing any slowdowns.
Well done so far, Apple.
Previously here:
No! No iOS Menubar!
Videos: More iOS 12 Beta 1 (With An Apple Books Peek)
Videos: iOS 12 Beta 1 Running On iPad
WWDC 2018: iOS 12