xkcd references and Zipf’s law

The reddit bot /u/xkcd_transcriber keeps track of xkcd references on reddit as a side-effect, and publishes statistics here.

As I tend to look for Zipf’s law in anything involving ranked frequencies, I plotted a log-log graph of rank versus number of references:

xkcd_zipf(The blue line is a power law regression, i.e. what the data would lie on if it followed Zipf’s law perfectly.) 

Not bad, not bad at all.