UPDATE: Dharmesh updates Grader every month and things are pretty much back to normal now. Before i wrote this post I was under the impression that the whole algorithm changed.

Sometime over the weekend Twitter Grader changed up their algorithm for ranking their top Twitter Users.   Most of the top users out there that we all know and are fond of (ChrisBrogan, Zaibatsu, BuzzEdition, Scobleizer, GuyKawasaki, etc etc) cannot be found on the Top 100 users list and their grades have bumped down drastically.

A tweet from Grader and Dharmesh himself addresses the change in algorithm:

Just released a *massive* update to the Twitter Grader algorithm.http://twitter.grader.com – Ranks will be erratic for a bit.

My personal grade has suffered drastically and keeps on decreasing! LOL (speaking of erratic!).   I am an advocate of change but can’t help thinking to myself how this will affect so many power users out there who regularly check their grades and compare with others?

Twitter sure seems to be changing, first with lists (and that war is just beginning) and now with this new algorithm that no one really knows much about.  It’ll be interesting to see whats next in their bag of tricks!!