I've never ever had clapping while landing on any flights between England and Europe, and back again.
But my brother, who has flown to America and back, says that pretty much all the Americans on the flight clapped and cheered when the plane landed down, both in the US and the UK.
None of the Europeans or other nationalities clap.
Mind you, I think it's true that Americans, as a people, are some of the least air-travelled people in the world.
Or at the very least, have a tiny portion of their population who have even left the US at all. (I read this statistic somewhere before, but not sure where)
So, maybe flying is a real novelty for a lot of people.