There has been some discussion recently on this board regarding DTD sales see. "How to handle a DTD Salesman" on this board.
Here is the related article;
http://blogs.consumerreports.org/home/2008/09/kirby-vacuums.html
Arising from the ways that the dealers were treating the elderly, according to this article; Kirby now allows a one year return policy for older americans.
Thre was a story in Arizona where a woman with failing mental capacities was sold and resold almost a dozen vacuums in a very short amount of time. The daughter sued the local Kirby distributor and they were forced to return the woman's money. I will say that there are other high pressure DTDs out there, Kirby just has the bad rap. I understand that they are being told to do better as it is hurting an otherwise good vacuum reputation.