User blog comment:BertH/Layout and navigation updates coming October 3/@comment-731149-20121003040413

"Better performance", merge server side the stylesheets and JS if you want performance, you will earn probably 5 times more just merging the CSS files than with this navigation bar change. For this page my browser had to try to load 13 CSS files, even if some of them are empty, every call counts.

Don't get me wrong I like the change, only not the performance justification.