I watched Roberta's show on Saturday (I think that's when they were on) and they made sure to say which flowers were real when they were presenting. It seemed that all of them were.
I agree about the flowers looking fake. They seem way too perfect. However, we have to keep in mind that they grow their flowers in greenhouses and force blooms so that they can bring them to QVC. The flowers have the perfect growing conditions with a lot of fertilizer to make them bigger than we'll ever get them.
I have bought many flowers from Roberta's and Cottage Farms. They NEVER look anything like what is presented. Last year was the first year in a long time that I bought nothing from any of the plant companies on QVC. I stuck with my local nurseries and garden centers and I wasn't disappointed.