What is the disadvantage of a presentation that uses too much text?

Participants in this event are challenged to use presentation technologies and software to prepare and deliver their message. Most consumers understand the need to invest for their financial future, but do not have a thorough understanding of the investment options. You are to create a multimedia presentation that teaches people about investment options. The presentation should explain stocks, corporate bonds, government bonds, and real estate as investment options. Each type of investment should be carefully defined in the presentation. Definitions should be in terms the average consumer understands. The presentation should also emphasize strengths and weaknesses for each type of investment.
Presentations can be created by 1 to 3 members, and may be submitted using only a CD or DVD. Presentations must be at least two (2) and no more than four (4) minutes in length. They must address the assigned topic, be well organized, and contain substantiated statements.