I noticed something similar with expressing gratitude - I feel like Americans are much more likely to write things like "Thank you for your amazing work on this

I noticed something similar with expressing gratitude - I feel like Americans are much more likely to write things like "Thank you for your amazing work on this!" or "Thanks so much, that's extremely helpful!". Sometimes it makes it a bit hard to tell whether people really think you did a good job or whether it's just pleasantries. I think it's generally meant in a friendly way though, and I have started to be a bit more expressive with thanks as well (though only when I mean it).