on Jane Friedman site:
Some editors (like me) will occasionally admit they might decline a submission after reading only a few paragraphs. It’s not that they are mean-spirited, or jaded, or working too quickly to get through the submission queue. Instead, their experience allows them to instantly recognize when writing doesn’t meet their journal’s standards. Often it’s in the details—in the lack of telling details, that is.
For example, very often we begin reading submissions that start with a description of a person or a place. Too often the details offered are flat and generic, describing only superficial aspects. Kind of like reading a police report: