Are Caucuses Effective?

[earthforge]

Democratic party president Dean changed the democratic party primary system to a way he deamed "better" and cheaper. This is now in effect this presidency full force. But is this really effective?

[Frosted Heart]

Can you give us more information? Not everyone is familiar with how an American party caucus works. :)

What was the old way? What did he change and what is the new way now? Why does he think it's better, etc.