[artdutra04]

If you use a preloader, people on slower connections (like on mobile devices) cannot any content until it has 100% loaded, which many take up to a minute or more. Without a preloader, they can at least see text and links before all the images finish loading. This is the reason why no popular websites ever use preloaders.

Flash is a tool, just like a hammer. And when you focus on using a hammer and nothing else, all problems look like nails.