Without a more cross-cultural study this falls more into the domain of cultural bias (still interesting) than what the title suggests. I'd love to see what the

Without a more cross-cultural study this falls more into the domain of cultural bias (still interesting) than what the title suggests. I'd love to see what the results look like incorporating data from cultures whose musical traditions are rhythmically complex and better documented. Godfried Toussaint's work on Euclidean Rhythms (http://cgm.cs.mcgill.ca/~godfried/publications/banff.pdf http://cgm.cs.mcgill.ca/~godfried/publications/banff.pdf) makes for a pretty convincing survey of "evenly spaced" beat distribution, albeit sometimes over uneven lengths. This doesn't even get into things like the polyrhythm and syncopation in much African music or the complex rhythmic cycles found in Indian percussion.