I have a web app that is essentially a full OS GUI in the browser. The load time in Chrome with state restoration is almost exactly 0.3 seconds, which includes asynchronous gathering of file system artifacts and rendering display thereof.

At the same many primarily text sites struggle, such as news and social media, struggle to load in 15 seconds.

My connection measures about 920mbps down so 15 seconds is really ridiculously slow. This is certainly not a technology problem evidenced by my own app that is doing so much more is such shorter time.