Do you have an anger management problem in real life too?
I'm American, but have been living in London for 15 years. Ten of them not far from the Wilton Crescent house you listed (which, as an aside, is a really weird and dead neighbourhood because very few people actually live there, it's mostly a place for people to park their money). I do think there are some real differences not only between the UK and the US in how houses are marketed, but within the UK between regions and social classes. I've joked on this thread about how can you judge the social class of a house, but there are subtleties that distinguish here that are beyond the cost.
The very highly staged houses are telegraphing that they're either for the international market at the high end, and, at a lower price point, for a more working class market. When we sold our house near WC, for a good whack, but not in the 44m range, we were advised to do that, but went with a realtor/estate agent who sold largely off market, so they worked a bit differently.
And, yes, adding - to take @paint101's point, you also get very highly staged 'footballer' type houses, usually expensive and sprawling in the suburbs, with lots of bells and whistles and acres of white marble (or faux marble flooring). That would also be judged on a class basis.