"across the pond" usually means the other side of the Atlantic Ocean. [1] So in this instance, left-ponders would be Americans to someone in the UK, and right-

"across the pond" usually means the other side of the Atlantic Ocean. [1] So in this instance, left-ponders would be Americans to someone in the UK, and right-ponders would be English to someone in the USA. [1] https://en.wiktionary.org/wiki/across_the_pond https://en.wiktionary.org/wiki/across_the_pond