It has also to be remembered that this is the BA Forum. I should imagine that most would be capable of drinking the difference in Champagne.
Frankly, I was totally underwhelmed by AA's domestic product. The seat is fine. When everything worked. It didn't. We ate Chicken Pot Pie three times, the alternative being stuffed peppers. They were bland beyond belief. The seat apart, I could tell little difference except that the wines were appalling.
Frankly I am not about to start buying motorway stop sandwiches and overpriced drinks in ET, thank you very much.