From T4rd on the [H];
Just to add to Samsung's software issue argument; Erica Griffin actually mentions it in her GS8 overview here. She recalls how her GS7 Edge has slowed to a crawl a lot during normal operation, despite disabling bloat apps and factory resetting the phone
WATCH SPECIFICALLY STARTING AT THE 9:05 MARK
I personally wouldn't touch these S8 phones, they will lag, hiccup, and have micro stutter, just like the Note 7 did, the S7 Edge absolutely has, the Note 5 lags, the S5 sure did, the S4, etc...
Still the best Android phone out to date, is the Google Pixel XL, but unfortunately that phone is a myth, and really doesn't exist LOL