They are extreme tests, using the most demanding Apps (games mostly).
I'd like tests with more of the Apps I use often (don't play many games). Therefore, they're not as accurate as they could be for my use. But they hint at the user experience, which I appreciate - both snappy performance & memory management combine to make the phone a pleasure to use. Many may not notice it, as the Apps they use aren't memory hogs, but even the lesser demanding Apps slow down now & then if the hardware isn't up to the task, which can happen as the phone ages & software integration deteriorates.
Having as snappy a phone from the outset means you have that buffer to cover slow downs over time.
But has there been a flagship phone in the past two years that isn’t snappy at the outset?