I have seen alot of stories about people who didn't "appear grateful" for quilts they received. I just thought it would be a good idea to keep in mind...
1. Many people, especially young ones, are very nervous as the center of attention at a wedding/baby shower. A better measure of how much they like a gift/quilt is how much it gets used and what they say about it later.
2. Sometimes we catch people off guard giving them something as a surprise and they are speechless.
I gave my cousin an Irish Chain queen sized quilt at a shower. She barely opened it to look at it but she was so nervous in front of all those people and so time pressured to open everything. She couldn't gush over a quilt and not gush over every single other gift. She later told me how much she loved it. I had also given her a lap sized scrap quilt for her engagement party. She didn't open gifts there, but her now husband came up to me months later and made a comment about how surprised he was that such radically different fabric could make such a cool quilt. (that's why they also got another quilt)
I surprised my aunt with a quilt to thank her for helping me with my son. She didn't say much but later my cousin was "ripping into her" about how she was bragging to others about how she was now a quilt owner!
Now I just assume that everyone I give a quilt to loves the gift.