[Max Taxable]

Originally Posted by Princeton

you may (or may not) improve the grade by using subdomain for static files

It doesn't, the "poor man's CDN" is and always was a myth.

poor example

Actually it is a very good example of what can be accomplished with relatively very little effort.

all CSS should be loaded prior to ANY <scripts> ... doing so will allow the page to be rendered to the reader right away instead of waiting for <scipt> to load

<script> tags block parallel downloads

There's always a point of diminishing returns. Re-coding the entire vB4 default style to get CSS loading first isn't practical.

And as illustrated, parallel downloads were not blocked in the example, at all. (See the waterfall chart.) All the CSS loaded in the first 11 calls anyway, even before optimization work.