A very wise mentor once told me that in all things dealing with others is to first 'give benefit of the doubt'. It is something I have to do frequently, as it seems as the common courtsey of a thank-you for your efforts is oft times ignored.
I've found that rarely do I receive thank-you notes for wedding gifts, new baby gifts, shower gifts.
We are retired and on a fixed income, for our closest neighbors I make and hubby delivers hot cinnamon rolls Christmas morning....I've yet to receive a thank-you note...or even when we see one another a comment on much they enjoyed the rolls. I always revert back to the thought process my gift was, 'in giving' and isn't/or shouldn't be, diluted by their not having acknowledged my efforts.
When it comes to the donation quilts I would definitely find an organization that takes the time to acknowledge your efforts with the very least a post card recognizing your contribution to their effort. This is just my perspective on your question. :0)