Really good article, Chip. As a project management consultant, I live managing expectations.
Couple of points, however. As you got to the bottom (Give And Take, and Insist On Respect) you seemed to focus on the client missing on the expectation.
But expectations are a two way street. You, as a consultant, have expectations of the client (in total and in part). But the client also has expectations (both of you and the work you are doing).
Unfortunately s**t happens. On both sides. Respect (and Give & take) must go both ways in order to form a solid basis of an agreement. And without respect on both sides, you can't create empathy and the understanding which is necessary for resolution and forgiveness.
Other than that, excellent and spot on!
Glen Ford, PMP
http://www.TrainingNOW.cahttp://www.LearningCreators.com/blog/ 
