Site link for the Office of Information Technology home page.
Including the rotating images section and the tweet channel, there were 28 images when I took this snap.
Total size: 443 kb. Most of the logo and icon images are in the 4 – 6 kb range. The rotating images are larger. The largest was 75 kb.
Images are used both for navigation (the rotating images are links) and to add visual interest.
You can navigate the site without images; but it is not aesthetically pleasing.