Recently I've seen some sites that tell how much time it takes you to red an article on it, most notably the incredible medium.com (which I consider master of UX).
I have two questions rerading this feature:
Is it considered a good feature for all types of article-based websites? I mean, if a site is known for having long articles written on it, will it still encourage readers (who already expect long reading time) to go on reading, or this is only useful for medium-size sites.
How is that time calculated? is it based on word count? although I still like this feature so much, it mostly takes more time than told, perhaps due to English not being my native language. So to recoin the question let's say: how should this time be calculated to give a good use experience?