Thank you to all of you!
When I made that video, I mounted two Michelin cross tires, but the day after I tried to make the same "drifts" with standard Segway tires and it was really amazing!
You can slip for over two or three meters and if you try to make a curve at "high" speed or a lot of short but hard maneuvers, you can feel how the stability control effectively works.
Now it's snowing here, so I look forward to make another video, using even standard tires
.