This question is answered by Todd Janzen, who is the Global Vice President of Q Branch at Salesforce.com. Q Branch is one of the coolest divisions of Salesforce, completely focused on building world-class Presales capabilities and the chief embracers of Buyer Enablement. Todd gets tactical about how Salesforce.com specifically uses the 6 demo types in their strategy to change the way they sell.
Presales » How do SEs do fewer wasted demos and more high impact activities?