I think it is clear that the much broader user/marketing/coder community has a much less rigid definition of these terms. In my opinion, fighting against terms or ideas getting watered down is a lost cause. It inevitably happens and there is very little that can be done to stop it.

As I said in another reply really the battle cry should be something along the lines of "Every database needs a real thoughtful precise technical breakdown" not "Stop using terminology that gives a brief, if imprecise, overview of the product". Because the later is almost certainly not going to happen.