Reality of what? No speaker is driven continuously for 30 seconds at any frequency let alone in treble, when playing music.Erin shows measures additionally a 30s compression based on the multitone stimulus of his MD measurement which is more demanding and closer to reality, exemplary the short sine one
Such tests are useful for PA speakers used in live venues and such. This is why such testing is not done for domestic speakers.
As is, i am getting push back from speaker manufacturers that we are triggering their integration based protection circuits. This is with the short sweep and I have to agree with them. And you are advocating 30 seconds flat sweep as reality???