PowerPoint can be a useful support tool when used correctly. However, in most cases, PowerPoint slides scream, "I want you all to see the 3x5 note cards I prepared for you last night, which I rehearsed at Starbucks an hour ago." (Thanks Steve Cruz.)
Forget the long bullet points and power-paragraphs. People of all cultures and backgrounds think in pictures. Use graphics to support your message. People are persuaded by "trusted advisors," not PowerPoint. How will you become the trusted advisor if your audience is reading slides during most of your presentation?
Not sold? Try looking away from your screen for a moment and recalling what you remember from it. The text or the graphics?