I noticed that while reading on medium.com every article has a suggested reading length.
Reasons this might be good UX include:
- It adds relevance/timeliness (just as we list author/date of publication...)
- It attempts to give a transparent/forthcoming experience to potential readers (people may be commuting to work and have 10 minutes left on their trip),
- When readers are viewing the article page itself, they may - as I do - look at the size of the scrollbar for an indication of article length. This is often erroneous as there may be a bunch of non-article content below the article itself (footers etc).
Is there any formal research on this? Or is it something that's just done for novelty?