Is the lengthy post more likely to be shared?

Kumail Hemani at Search Engine Journal makes his case for the lengthy, comprehensive post:

Provide readers with meaningful content that pushes them to something actionable. Rather than being a blog post that someone reads and forgets about before sharing it on a social network. Look at your content and check to make sure someone will get value from it. 

If they don’t get anything out of it, they’ll never share it or tell their friends about it.  Your post will be dead. ... Before publishing your content, think like the expert.

He backs up his opinion with some research:

Two University professors of Pennsylvania looked at the New York Times and found what kind of content generate most shares and links. They found that long, in-depth posts appear to go viral much more often then shorter posts.