I would love either one of your quilts! Don't feel bad, just consider it a lesson learned. Not everyone appreciates the time and money it takes to make a quilt. Be thankful you didn't raise the idiots who don't have enough common sense to write a thank you note.
I guess my age is showing, but it really bothers me when young folks don't have manners -- all children should learn the important of "thank you" notes ESPECIALLY when someone makes them something special.
Your quilts are wonderful and I know how to write a thank you note!