Chris,
Assessment is not somee we do "to" our students, but "with" our students. It should encourage them to learn more not to quit learning. When teaching online time is of the essence, but take my word on this - if you give feedback immediately, they will expect it immediately all the time.
Set rules in your syllabus about how often feedback will be provided. My rule of thumb is within 24 or 48 hours, depending on the course and course content.
Thank you for your input.
