Is PageSpeed insights reliable?

Related questions

1. What is a good average page load time?
2. What is a good page load time?
3. What is Google Speed score?
4. Why do pages take so long to load?
5. Does PageSpeed affect Google ranking?
6. Does Page Speed affect quality score?
7. How fast is Google server?
8. Do I need CDN?
9. What is YSlow score in GTmetrix?
10. What is a good PageSpeed score?

Tags

1. #experience
2. #surprise
3. #grade
4. #because
5. #scores
6. #short
7. #analyze
8. #while
9. #google
10. #pagespeed
11. #insights
12. #loading
13. #websites
14. #accurate
15. #truly
16. #might