IMHO, I don't really think rank matters. I remember a similar conversation on e-budo regarding this. Some believed there is a "watering down" effect going on and people are getting promoted rather quickly without fully understanding the basic principles and so forth. Some have argued to get rid of the ranking/dan system and perhaps adopt a menkyo or some sort of licensing system, but the problem could still exist in that type of licensing system. I think the true test is time and how one is measured should be between the student and teacher. It's a tuff call to make and there really is no full proof way to to ensure some sort of quality control to this. But back to the question at hand, no...I don't think that rank matters. Good topic of discussion.