Well, I've been gathering BPM statistics about my music collection, and here's what I have.
NOTE: "Vocaloid" refers to Nico Nico Douga music in general; the name "Vocaloid" is vestigial.
These are some general statistics about my entire collection. The quartiles and so on are about overall BPM, not per-artist.
The following graphs show the frequencies of BPMs grouped into "buckets" of 5 BPM each. The second graph is a probability distribution of the BPMs, with the blue line representing a normal distribution and the red line representing a density distribution.
This is probably the most interesting plot: I took all artists in my collection who have at over ten tracks and created a boxplot comparing their BPMs:
More detail after the jump…
While I do have this category in the box plot above and among the histograms below, I also compiled some statistics about the "Vocaloid" part of my collection.
For all of those artists, I did similar histagrams/density plots as I did for "Overall" above: