I love buttermilk pancakes. Being able to make them on the weekends for breakfast at a later date is just a bonus (like Eggo without the preservatives). I'm just not sure how long they last for in the freezer, as in, if they will ever get freezer-burn like meat does. I store them in individual ziploc bags for easy retrieval.
Its going to depend on the type of packaging and also the freezer.
Lightly wrapped in plastic wrap (or worse, paper) will freezer burn fairly quickly. Vacuum-sealed will last much longer.
A self-defrost freezer with wide temperature swings will burn quicker. A manual defrost chest freezer much slower.
Worst case is probably around a month or less (not really sealed, freezer with wide temperature swings), best case (vacuum sealed in stable temperature chest freezer) over a year.