Yes, that´s true. That´s why I sometimes skim read books when I´m contemplating to DNF them. If I don´t enjoy skim reading it, it´s definitely not worth to be read in its entirety.
I never felt like DNFing The Enchanted April, though. Even though I didn´t enjoy the first couple of chapters that much, it still was enjoyable enough for me to continue.
Yes, there is a movie from 1991 starring Jim Broadbent, Miranda Richardson, Alfred Molina and Polly Walker. I haven´t watched it yet, but I´m planning to watch it in the near future.
I never felt like DNFing The Enchanted April, though. Even though I didn´t enjoy the first couple of chapters that much, it still was enjoyable enough for me to continue.