I think would be interesting to see the numbers on how many users there are at each level. Just a number next to the tiers and masters boxes on the ARP page or something like that.
I passed in to the first rank of masters today so I know from looking at the leaderboard that there are at least 2853 users that have reached the masters. But the nerd in me want more statistics. :)
Oh, and if this already is available somewhere I thank you in advance for pointing me in the right direction.