How does Oscar Wilde picture the Americans in his novel?

In Oscar Wilde's novel, The Canterville Ghost, Americans and Brits are characterized in a manner that teases out stereotypical characterizations. Americans are depicted as skeptical, sensible, and uninterested in aristocratic titles or obstentatious displays of wealth. The Americans are hardly superstitious and refuse to be put out by the presence of the ghost. These depictions harken to stereotypes of the hardy American pioneer who faces adversity head on and despises the rule of the elite, wealthy aristocracy. Of course, these are simply stereotypes. Many Americans are highly superstitious, chase wealth like many others in the world, and envy the wealth, titles, and eliteness of the ultra-rich. In the novel, the Brits are depicted as superstitious inhabiters of the traditional old-world. They are much more affected by the presence or talk of ghosts, find pride in elite traditions, haughtiness, and aristocratic titles. The differences depicted in the novel feel more relevant for general class distinctions rather than nationality distinctions.

In his story "The Canterville Ghost," Wilde pictures the Americans in sharp contrast to the British. The British are very tradition-bound and honor old ideas and old customs. The British believe in aristocracy and admire people who inherit titles, such as the Duke of Cheshire or the Queen. The British believe in ghosts and in inherited wealth.
In contrast, the Americans are forward-looking, practical, and don't put much faith in old traditions. They are no-nonsense people. The American Otises, for example, simply scrub out the blood stain left by the ghost with Paragon detergent. Rather than fear the ghost the way the British do, the Otis twins play jokes on it.
At the end of the story, Mr. Otis does not want his daughter to inherit the jewels, as he believes it is better to live simply in the American way. While he is proud of his daughter, he is not particularly impressed that she is marrying a duke: Mr. Otis prefers life in a republic where everyone is equally a citizen and nobody an aristocrat.