I think it's hard because everyone will have a different opinion on what is good content. However, I do agree that short-form content tends to be the best draw for people. I don't know if there are that many people who would want to read a 10 minute long post and they would probably move on unless it really interests them.
This is exactly the problem. I, as a long time hivian, have difficulties to read very long posts. I belive that others just check the titles and curate accordingly. So the question is really what kind of value these long form content posts carry? Short for content allows much more interaction and engagement and everybody can do it.