I've said this before, but, it doesn't bother me if hosts do not eat the food since I don't base my food purchases on their reaction. However, with that said, I believe QVC should have a standard. Either none of the hosts need to taste, or, if QVC pushes them to try each item then all hosts presenting should.
With David and his diet, when he doesn't try a food due to calories, carbs or whatever, it gives the impression that the food is not healthy enough for him and it shouldn't be healthy enough for us.
I do purchase a lot of the food on QVC. We eat healthy most of the time. Occasionally we like to eat their Heartland chicken, battered Mahi Mahi, and caramel apples, etc. We are not overweight and workout at least 5X a week. We can determine what WE choose but it's a disservice to the vendors when "it appears" a host won't try due to fat/carbs/calories. It's a little ridiculous anyway how the hosts roll their eyes and act like each item is better than the last.