Providing diagrams, designs, wireframes and prototypes to a client without explanation and opportunity for understanding the solutions intentions is a big NO-NO. This doesn't necessarily mean that an indepth model should be accompanied by a novel...but should be incorporated at a well structured presentation.
**btw - Axure rocks! The best tool on the market (for non-collaboration) that assists us in our crafting all required IA/UX/Technical Instruction elements.