The examples this site chooses aren't the greatest... It maps an entire artist to a genre, so when one artist makes multiple genres of music the examples end up being very off. Take dubstep for example, the artist they chose for the example is Skream, one of the people who popularized dubstep, but the song they chose is his latest release "Otto's Chant" which is tech house, not dubstep. Skream hasn't even made any dubstep in quite a while.