#1 The Navigation
#2 Background colors. The top and the inside panels are all HTML/CSS background colors so that they load instantly.
#3 The cool font is not an image, but in fact HTML text. This means there is no loading time and it is SEO friendly. We use advanced HTML/CSS technique that allows us to use any font with the HTML.
#4 When images are used we employ advanced HTML techniques to minimize load times. You can see that the image we use is thin - it tiles fully fill up the allotted space. The actual image we use is so thin that we tripled it's width just to make the image visible so for our audience.