Microsoft Office Assistance: InfoPath or Word: Choose the best tool for the job: "You know that you can create documents in Word, including simple forms that others can fill out. Now you can also create electronic forms in InfoPath. How do you decide which program to use?
The answer depends on what you're trying to do. Although it's true that you can use Word to create a document that looks and feels like a form, Word works best as a word-processing program, not a form-designing program.
Conversely, InfoPath was created specifically for designing and filling out electronic forms. Moreover, with InfoPath, you can easily reuse the data collected in a form elsewhere within your team, company, or organization."
I'm just guessing this was written by somebody on the InfoPath team (2 paragraphs for Word versus extensive InfoPath detail)...