Is it just me, or does the feed for all realms not have any data for players below the level of 10? This may be intentional, but I wanted to make sure. When looking through the file it seems as if everyone starts at level 11. Also, I get different results when I sort the data than what is present on the site. For example, I show warriors and warlocks as being the highest percentage of classes, whereas the tool on the site shows hunters by a large margin. I could be wrong, but either way I was just giving a heads up as to some things I noticed while playing around.
Thanks for opening this data up to us to play with!