I think he means by one shots in general, but not all the time, since majority of the one shots can be quite detailed and long. Certainly short one shots are possible, as long as the meaning and point is taken across.
Again, descriptions in general. Many people prefer stories that are descriptive, although of course simple description is perfectly fine, as long as it's legitimate and satisfactory. =D
About the whole issue with 'said,' I was given the impression it meant something like:
"Hello," Marie said.
"Hey," Sam said.
"It's a nice weather today," she said.
...something like that, probably implied as overusage?
I suppose ya better ask frostweaver. o.o;