LOL experiments!
(strange foreign scientist voice) I think we experimented to solve problem! (Crowd Control - Thors Armpit)
edit: but I do agree with NilsTentacles, cause I know when I listen to music genres I am not really into, I do find it to sound very much the same from track to track or artist to artist. I mean play Ultimae releases to a rocker, he would surely just say it sounds exactly the same.
But it's also that people that have a genuine music interest really lsitens when they hear a track, which is not the case with you're everyday Lady Gaga listener. They need simple melodies because they don't want to exhaust they're pathetic brains(minds) by fully getting wrapped up in the music.
edit2: ehrm saw that all my statements were stated already next time I'll read the thread first, excuse me.