Yes and no ( I know a real helpful answer).
If I am buying solid/blender fabric where an exact color match is not key, I would probably go with the cheaper fabric given that the quality is on par. Why pay extra when I am not really gaining anything???
On the other hand, I will pay more to get "perfect" match in the cases where it makes a quilt go from just OK to WOW. In this case, the few extra dollars do seem worth it.
I think you are in tough position as a buyer. Unless you have a magic ball that will tell you the exact needs of your customers, you cannot win.