This may seem like a minor distinction to some, but it's worth noting that this movie is set in Edwardian (1908) times, not Victorian. This is the crux of the social commentary in the book (and, by extension, the film). Charlotte and Cecil are relics of Victorian stodginess, and George is the wave of the future. The line "The possession of leisure is a wonderful thing", when directed at Cecil, is a tongue-in-cheek insult. In 1908, "gentlemen" were giving way to a merchant class that respected those who earned their keep.
Consider that in 1885, Victorian Lucy would have fainted dead away if she saw George skinny dipping - or she would have been expected to fake it. She would not have understood the subtle suggestion that Cecil is probably gay. But our Edwardian Lucy of 1908 laughs, rather than faints, at the pond. She fully understands what George means when he says that Cecil is "the sort who can't know anyone intimately, least of all a woman." It's perfectly reasonable to expect that many viewers lack this context, and as a result are bored to tears by this film. Those of us who enjoy this sort of thing, however, will find reason to enjoy this film time and time again, year after year.
Consider that in 1885, Victorian Lucy would have fainted dead away if she saw George skinny dipping - or she would have been expected to fake it. She would not have understood the subtle suggestion that Cecil is probably gay. But our Edwardian Lucy of 1908 laughs, rather than faints, at the pond. She fully understands what George means when he says that Cecil is "the sort who can't know anyone intimately, least of all a woman." It's perfectly reasonable to expect that many viewers lack this context, and as a result are bored to tears by this film. Those of us who enjoy this sort of thing, however, will find reason to enjoy this film time and time again, year after year.