Gosh, old thread. But a good one.
My local Tesco Extra is also a two floor job, with parking underneath.
It seems to alienate quite a few shoppers including myself. My elderly parents hate those travelator things, I doubt they're alone. And due to the scale of the place, the walking distance from one end of the store to the other is obscene if you are in a rush or of poor health. Because of that and their accounting scandals I've voted with my feet and boycotted them for a long while, they have nothing to offer me at all that I can't get from Sainsbury's or Morrisons without having to walk the length of a football pitch just to grab a loaf of bread.
But when I used to go frequently it was very rare to see older clientele in there. Whereas if you go to my old fashioned ground floor medium sized local Morrisons on pension day, it's rammed!
Epic fail!