To be fair, though. The 5-second thing happens on other social media, as well. Hell, I myself am I quasi-known name in my country's "social media circles", which means I've attracted quite a few fanboys. These fanboys will "like" everything I post on Facebook. And they usually do it in a few minutes, even if it's a really long post that one really won't read all the way through in such a short time.
But yeah.