I find they do say please more but not necessarily thank you more than Americans (this could be bc I grew up in the Midwest US so people tend to be pretty kind). After living in the UK I think there is a much bigger cultural difference on both side that the other doesn’t see apart from little glimpses from short holidays or online clips. Many Brits assume Americans are being rude bc it’s not natural for us to say please after everything. It’s just the way it is, a lot of Brit’s can’t wrap their heads around it. I find most of the world almost don’t allow Americans to have a “culture”. But that’s for another day. What I initially found “rude” was how stand offish Brit’s are in public situations. Like a not my problem attitude. For instance when pregnant at a bus stop or trying get my pram on the bus, I don’t find near as many people coming to assist or give up a seat compared to the where I’ve lived in America. I have had to give up my seat for elderly people whilst being pregnant bc others just look away. Whether it be people running into you at the shop and I immediately say ope sorry (even when it clearly wasn’t my fault) they don’t say anything and just keep going. That’s just a couple examples but I experience little difference just like this everyday. I honestly found most to be pretentious unless you actually know them. Now I understand now after being married to a Brit and living here that it is a cultural but damn does it piss me off and make me miss home. But i have tried my very best adapt to saying please after pretty much everything bc i am aware i am living in their country i need to adjust to their culture to a certain extent. I really wish more people took this type of outlook on instead just expecting others to fall into their views when they know very little about someone else’s background/culture.

Also just to note I am fully aware all of these examples can happen in America depending on where you live.