When an actor delivers his lines, he's into it - he believes in what he's doing.
No matter how the actor - his name is David Gunderman - delivers that line, he must take great care not to gloat.
To answer your question, British actors deliver flawless American accents.
The actors deliver lots of brooding speeches, and the plot is a downer.
After the song, an actor delivers a speech based on it.
It also means that actors can deliver their lines and songs in the same low-key style they might bring to a movie performance.
The actor delivered the line with almost perfect indignation, never hinting that the matter of 'finding himself was at all familiar to him. '
Both actors delivered the requisite narrowed eyes and twanging, faltering style of speech.
The clumsy staging does not help; the actors deliver their final lines straight to the audience, as if they were in different rooms.
None of the research helps, of course, unless the actor in the lead role can deliver the goods.