Web page load times
Most users spend most of their time on other websites. Your website is viewed a very small proportionate of their time. Therefore if you make your pages load faster than most other pages on the internet, your users will believe your website is lightning fast. Generally the optimal speed at which a website loads is based on a comparison against other websites.
If users look at your website and compare the loading times against others, that means that a single page load is probably not sufficient for the user to make a correct comparison. Most likely the user would need to view multiple pages of your website to make a judgment about the load times.