Okay, but your example was about battery life:
> LIke when they said an Macbook Air would last 10+ hours and third-party reviewers would get 8-9+ hours. All the while, Dell or HP would claim 19 hours and you'd be lucky to get 2 eg [1]
And even then, they exaggerated their claims. And your link doesn't say anything about HP or Dell claiming 19 hour battery life.
Apple has definitely exaggerated their performance claims over and over again. The Apple silicon parts are fast and low power indeed, but they've made ridiculous claims like comparing their chips to an nVidia RTX 3090 with completely misleading graphs
Even the Mac sites have admitted that the nVidia 3090 comparison was completely wrong and designed to be misleading: https://9to5mac.com/2022/03/31/m1-ultra-gpu-comparison-with-...
This is why you have to take everything they say with a huge grain of salt. Their chip may be "twice" as power efficient in some carefully chosen unique scenario that only exists in an artificial setting, but how does it fare in the real world? That's the question that matters, and you're not going to get an honest answer from Apple's marketing team.