Well like I said it seemed logical long time ago because when I create my e-commerce that's what decided me to switch from dial-up to high speed connection. In 2005 much more people were in dial up and to optimize the chance to sell and keep people on the site, all the pages needed to load as fast as possible with minimum weight.
Now I can tell you that this factor is important but not as before because people have much faster connection.
That's why it was an important factor to load page fast. Do you remember to go away when surfing on internet because the page load took for ever to load? Can you imagine to go back in dial up today and wait before a page load? Beside, the coding made some huge improvement with css files.
Anyway that's why I said this on my prior post
As long as men are free to ask what they must, free to say what they think, free to think what they will, freedom can never be lost and science can never regress.