I didn't read 'most' pointing to poor performance? If anything, most were saying that the choice of snapdragon processor and big battery is the right one, as it means the phone can run efficiently and not drain the battery.
In terms of my personal take, the only lag I ever get is from Chrome. But this is my experience in general with Chrome.
Pages don't exactly flow smoothly when scrolling and pages with lots of images often are the biggest culprit.
From my experience using every other app, it's a winner. Even YouTube. I've been using YouTube on and off all day (to find collectibles on Yooka-Laylee, mostly 😛 ) and the app opens instantly, videos load instantly and rotating the phone makes the video do the same with absolutely no stutter or slow down.
It's these kind of apps I'd expect the phone to struggle with, but it doesn't at all.
Like I say Chrome is the biggest culprit for lag, but I've always hated Chrome personally.