My kids have eaten my scratch cakes with Swiss meringue or French buttercream all their lives. We were invited to a party for a little girl in my 4 year old's nursery class at church, and the mom served box cake cupcakes topped with powdered sugar crisco (Wilton class) frosting. My kids took one bite of the cupcakes and then told me they were gross and refused to eat more. Since twinkies are back on the shelves, I bought a box and brought it home yesterday. I gave one to each of my kids. They asked, "What is it?" and then tried them. They hated them! I hadn't had one in years - they were gross! Weird texture, somehow dry and gooey at the same time, and the filling was sticky gooey with no actual flavor, just sweet. Blech! An eye opening test is to bake a good scratch recipe side by side with a box mix and taste them together, really noticing thr texture and flavor differences.
My daughter came home from a birthday party when she was about 6 and told me that the cake was gross. I told her that it was okay to not eat any but not to tell them that it was gross! She said that she just said that she wasn't hungry so she didn't want to finish it.