About the Q "kitchen set":
One show Stacey was bending over to take a dish out of an oven. An ear bud fell in and she laughed and said Kitchen Aid Tina was there, laughing with her. Mark Charles was also there that day.
You can tell when guests are there if you're familiar with their own kitchens. Marie Louise, for example, has a lot of dark wood cabinetry, but the Q kitchen is white and stainless.
It's interesting that they keep them separate from hosts. I suppose as a form of crowd control.