I'm consistently surprised when things that appear to be in the collective conscience of society still haven't quite crossed the threshold and instead remain in relative obscurity.  The easiest example is any video from YouTube that has more than say 100 million views.  Ask the average person if they know what the fox says, and chances are they won't know what you're talking about.  Granted, a lot of this depends on your view of the average person.  If you're a teenager, your view of "average" is probably one of your teenage friends.  While in reality, average is probably a 40-year-old white mother from Ohio.  Regardless, there seems to be a delay or an impediment between certain things gaining widespread notoriety (e.g. Gangnam Style) and other things remaining popular but not universal.