"What I love most about the intervention is the attention it has gotten from developers. JavaScript isn’t a given. Things go wrong."

"And, for goodness sake, disable AMP on your website.
Don’t feed the monster – fight it."

"We gave the test to 136 people, and the skeleton screen performed the worst by all metrics. Users in the skeleton screen group took longer to complete the task, were more likely to evaluate their wait time negatively (by answering the first question with “Strongly disagree” or “Moderately disagree”), and guessed that the wait time had been longer than users who saw the loading spinner or a blank screen."

"Skeleton screens can improve the feel of any action taking longer than a few hundred milliseconds. Applying them to your rendering bottlenecks will make your UI feel faster and make people happier."