I read it. he's right that eastern european folk stuff is multivaried, but precisely b/c it extends from the balkans to the bengal and walls of China, and he misses this point out. I'm not sure if north african arab music is as unvaried as he says, though I'd probably grant that point to an extent, given that i can hear worlds of melodic differences in different regions of turkish folk music whereas arabic stuff seems to be more rhythmically different not tonally. maghrebi stuff has more lapsided rhythmic structures whereas egyptian stuff is more overtly middle eastern.