Showing that he isn't just a one-hit-wonder, Psy's Gentleman has rocketed up 100 million views in just three days, tying a record previously set by the Russian Meteor in February of this year. Meanwhile, Gangnam Style has shot past 1.5 billion views, an impressive feat as well.
VisibleMeasures has created the graph seen above that compares various videos and the time it took them to reach 100 million views. In comparison, Gentleman has moved at a much faster rate than Gangnam Style, likely due to Psy having gained a large audience from Gangnam Style.
If you're curious about several other metrics regarding Gentleman, check out source #1 below.