Well, cece, I don't think the whole eggshell issue has merited serious scientific study, but enough people have used the method that there is likely some merit to it. But maybe it IS a subtle taste thing. You know, I'll bet that you have fond memories of those days when you were a broke student, living in the moment & drinking cheap coffee!
Wow, Lincoh47! I supposed the cooked egg whites and yolk couldn't get through the filter, but that had to make a real difference in the taste. Sooo, what did you think? Did it improve the flavor of the coffee?
And yes, Summerkid, young and broke was a heck of a lot more fun than old and broke. :)