Not all bins are created equal
If you're a nerdy data analysis person you like to talk about "bins" of users.
CertifiedToRock.com has a scale from 1 to 11, but there are more 1s than there are 11s. The "bins" are not equal.
We really want to promote involvement in the project with this certification system. So, it's easy to move from a 1 to a 2. It's a little harder to move from a 2 to a 3 etc. This is about giving people success early so they become addicted to it.
But then going up the scale at the high end our goal was to make the scale into a useful distinction between levels of contribution.
The other thing about this is that we preloaded the site with a few thousand accounts, but nowhere near the number we hope to certify in total. And when you only have a handful of the number that you hope to eventually include there's no way to split them into exact sized groupings of folks. So, this first cut is a lot rougher than future cuts will be. In the future we will publish a distribution of how many people there are at each level, but not yet...
Suffice it to say: if you got a 5 or above you should feel really proud because you're among the best contributors to the project. And of course, as always, if you got a 1 you should be exited about that to (and hopefully excited to improve your score). We consider everyone with an account to be a Rock Star ;)