[cnanders]

That is a fair critique of the article. The vast majority of the songs that came into the analysis were in fact billboard top 100 so that naturally filters out songs with chords that might sound bad (chords that as a rule are not built off of the major scale the song uses). What we found most interesting, however, was that there are certain patterns that really do show up. The one that was most striking, and that we pointed out in the article, is that the iii chord is almost always followed by IV or vi in pop music. There were similar trends for other some of the other chords that we'll be posting in a later article.