When meeting with a potential client, a good demo goes a long way to having the client understand that their needs wil be taken care of.
One of the best strageties is to have them watch you create a website because it takes less than a minute to get a site going.
Simply log into your Dashboard and click on the big blue Create New Site button. From there:
Now, enter your clients username and password, and start showing off your easy-to-use CMS. You can show them how to edit the home page, create a couple of pages, or add a modules if you have time.
Your clients will say "Even I can do this", which is exactly what you want to hear.