i can't help feeling that the expectations may be part of the problem, but thats just my point of view.
Expectations may be part of a larger problem but are still legitimate if based on something actually stated. The KS FAQ, "when a project slips, the project should share the story with the backers, speed bumps and all".
Lots of people might not actually care why it's slipped, but others who do have formed a legitimate expectation based upon what they read when they backed. So if it is part of a problem to hold a legitimate expectation, it's only part of a problem because someone is not meeting the expectation.
Granted, no one is liable to die over it - although reading this thread I feel I may expire at any moment! - but it's still a dropped ball because it's not clear if speedbumps are due to a poor initial plan, significant defects, lack of resource or desired enhancements.