[User9821]

It's people trying to be polite. If someone has a great time at a restaurant, do I really want to stop and tell them about my poor experience there? If we're openly discussing restaurants, then yes, I'll offer my story, but if someone is talking about their date last night, or lunch they took their coworkers too, etc, I don't want to insult their choice in restaurants, especially in front of others.

It's going to be different in Eastern Europe because there's more tradition. Compare it to older generations in America. I know my grandparents would never sugar coat a story, and if I said I had a great time at a restaurant, they would have no trouble interrupting to talk about that time they got food poisoning there, or saw a mouse on the floor.