Editing U and non-U English (section)

===American usage===

A study in 1940 on the speaking differences between the American upper and middle classes revealed a strong similarity with the results of Ross's research. For instance, the American upper class said 'curtains', whilst the middle class used 'drapes'. Notably, the well-heeled would use 'toilet' whereas the less well-heeled would say 'lavatory', an inversion of the British usage.<ref>{{cite book |last1=Baltzell |first1=E. Digby |title=The Philadelphia Gentlemen |date=1958 |publisher=Large Print Transaction |location=New Brunswick|pages=50–51 |isbn=9781412830751 |edition=1989 |url=https://play.google.com/books/reader?id=B1QAMx2idG0C&hl=en&pg=GBS.PA50.w.1.0.341}}</ref>