[JaRail]

+1. The majority of those requests on major websites don't matter. They are optional elements/scripts and prefetches for possible actions.

Now, if the point is that something will be delayed, that's true. And it's true that many people don't realize that. There's the classic example where if everyone tries to be five minutes early, your group is still going to be late.

The real lesson is to analyse your critical path to death and ensure it is as resilient as possible. And if possible, real data is buckets more meaningful than conventional load tests.

I also don't see anything in here about how to get meaningful metrics from real users. The W3C Navigation Timing API has really shed a ton of light into things commonly forgotten.