Yes they both have annoying idiots full of the own self importance in the way when i want to do any shopping
I think that says more about you rather then the place or the people that shop there
Just imagining a guy buying a paper in the morning on a Sunday while sneering at the guy in front for buying smoked salmon to have with his scrambled eggs.
This idea that snobs/self important shoppers going to Waitrose is more born as a result of their marketing rather than personal customer experience. In every supermarket you have idiots that take up aisle space, that dont get out the way, are inconsiderate and oblivious to their surroundings.
Tesco have always marketed themselves as good value and cheap, so people assume these oblivious shoppers to be idiots or dullards because they dont get out of the way. That the inconsideration is a result of them being the bottom rung of society and not caring for others or just too dim to notice that they have the trolly bang in the middle of the aisle.
Waitrose and M&S on the other hand have always gone for a premium/quality focus when marketing their brands. This then gives people the idea that the oblivious shoppers they encounter are self important because they refuse to get out the way immediately and snobby when they ask or are expectant of you to move when you are in the way.
Though one place that certainly do have a 'type' of clientele is home bargains. I never knew this place existed until i had to stop by halfords at a retail park and decided to pop in to grab a bottle of water. The place is basically a mini supermarket with only shelf life items which are mainly sold in multipacks. I found the clientele were all fairly large families, going round with a train of kids. It was a hectic and horrible experience.