The results are very US biased.
In the UK there are a lot of jobs advertised for DBA's and one of the questions employers ask is "Can you do stored procedures". Jesus!!!!!!!
In other words "DBA" no longer means "DBA", it means "junior programmer who can sit in box room and churn out code".
This is much the same way that "Executives", "Vice President" and "Consultants" used to be at the top of the corporate ladder as opposed to todays Sales Executive (shop assistant), Vice President in charge of sanitation (Senior bog cleaner) and Call Centre Consultants.
The process of gaining an MCDBA is useful because it is a learning excercise.
If the new MCDBA courses are as thorough as the old SQL6.5 Admin and Design courses then they are definitely a good thing.
The qualification of MCDBA is only useful if employers have heard of it and understand what it means.
To give an analogy, I met a director of a company who thought that XML was the new model from Mercedes!