Sorry, but Americans aren't so duped, and luckily, Toby agrees:
In my experience, this particular cliche is long past its sell-by date. Planeloads of freeloading British hacks - not to mention the three million British tourists who visit the country every year - have poisoned that well. On first hearing an English accent 50 years ago, Americans might have thought: stately home, private school, good manners. Nowadays, they think: low income, poor diet, alcohol problem.
So according to Toby Young, Brits perhaps can't milk their accent anymore. They actually have to prove themselves.