I agree they may not realize the amount of work put into it. If you have the chance to speak with them about the "care" of the quilt, I would do that. If not, drop them a little note explaining you didn't have time at the get together, but you wanted to make sure they knew how to care for the quilt. Then give a quick "wash it in cold water, lay flat to dry, etc..." That should give them an idea of how precious "the blanket" is without being pushy!