Most of that latency is coming from back ends across most major sites, anyway, so it's the wrong place to test.
As an addition to the general commentary here, "The Toilet Paper" is an unfortunate choice of label for this article, and maybe also indicative of the quality of the writing.
It really isn't - a ui framework should be able to properly handle backend latency and provide a great experience while waiting for a backend response with no flicker while not locking the entire ui. It's just way harder to set up good benchmarks for this.