I think the confusion lies with definition. Does the S8 Plus lag, probably not. Does it 'stutter' when scrolling through the home screens, settings, recent apps and browsing, yes occasionally. There are workarounds, like installing Nova Launcher or another launcher entirely. Some people have even sideloaded the older s8 launcher apk (weird I know) because they feel it's smoother. With ALL android, you'll eventually see that stutter. You can't escape that. Updates will make it better of course. But I will say, this is the best version of Touchwiz (Samsung Experience...) I've ever experienced. It feels snappy and smooth for the most part. I used Nova and liked it but went back to stock launcher because of the look and feel. I came from the **** S7 standard, so I certainly know what lag feels like. No where near that level right now.