Searching for the right information on a web page can be a very frustrating experience. Have you ever encountered web pages that are so cluttered with information and graphics, that you leave, totally exasperated?
The same situation applies if you have a web site designed with animated graphics, pop ups, revolving text etc. It may dazzle your visitors, but if it takes more than 10 secs to load, you will lose them. (see: "How to Calculate and Speed-Up the Download Time of Your Web Site"