Do you mean a test like this ?
Alfa Romeo 159 - better car than BMW 3 - YouTube
What I'm enjoying most about my 159 is the fact that breakaway is predictable and controllable. Unlike the Audi A4 I had which was the understeer king at times, or the BMW 1-series M-sport I had which gave you a warning but then switched ends rapidly.
See 1m20s into this (not me, but it's how it would go for me http://www.youtube.com/watch?v=UP8seBA7pH0
The Audi and BMW had suspension issues, because the loss of control was not gradual.
Unlike the Alfa, which always lets go when I think it will and never more than I want it to.
The ability to retain predictable control of a car is the key to being able to succesfully adjust your driving style to match the car's abilities.
It's all well and good assuming that the perfect tyres will improve your chances, but if the setup doesn't allow you to control the grip then there really is no point even going there. As long as the car is predictable when it is unstable you can control it.
That's what the Alfa has going for it, among other things, the fact that even on greasy roads with worn tyres you can get a feel for everything which it is going to do.
I haven't felt this confident since driving my Talbot Sunbeam Ti, back in the day.