Hi All.  In case you haven't seem our review yet, we've recently tested the Disturbed.

We had 4 testers: stroker, tweener, power tweener, and cranker.

The full review with digitrax and video is here:

http://tamerbowling.com/index.php/roto-grip-disturbed-bowling-ball-review-digitrax/

Just a quick excerpt of the overview...
Well we have a very predictable smooth ball motion. A benchmark ball that’s consistent is a great thing to have in the bag. The remarkable characteristic of this ball is that it is extremely predictable with moves. Move 1 and 1, and the ball does exactly what you want it to do, no surprises. It doesn’t react extremely fast to dry boards which gives it that consistency. You will not want to leak this one too far out or it will likely not recover. However, stay close and you will be rewarded with a consistent and continuous ball reaction. I can’t wait to see this core in a pearl and hybrid version.