I drove the Focus ST today at a Ford event. They let you take the cars out on a couple of autocross tracks and have fun. Nice car, great brakes, good power, awesome Recaro seats. And yes the stability control works well. Due to crummy asphalt and lack of driver talent I got to test the stability control going into a spin. Slowed me down right quick.
I have to say driving 260hp through the front wheels with no massive torque steer was of a surprise. It feels like a completely different car from my 2003 SVT Focus. I just rides like a more substantial machine. It makes mine feel like a tin can, but on the other hand my car has better visibility and feels much lighter and chuckable. I really wish I could have taken one out on the streets to get some real road experience. Interior is miles above what you expect in a Focus.