Unless it's uphill, not a thing. The key is traction control, not stability
control.

If you took at a wet greasy circle in 2nd gear with your focus (eg a
roundabout) you'd find a balance point with the amount of throttle you could
use and still maintain the circumference of the circle, without the inside
wheel spinning wildly. Same as 101% of other FWD non TC'ed cars.

Less throttle and the circle would tighten, more and you'd drift out,
despite using more steering.

With the TC activated (note this is NOT stability control unless you have a
Focus ESP, which is an entirely different beast) you can plant your foot
right down on the gas and still maintain whatever circumference of circle
you like, the ecu giving just enough power vs the tyres' available grip.
More lock to go tighter and you'll end up going slower as engine power is
further reduced.

If the rear end breaks away, or the tyres loose most of their grip the TC
will not stop you heading backwards through a hedge!

The TC on the petrol 2.0, AFAIR, reduces engine power only-through a
controlled misfire.

The ESP cars you can barrel into a bend at stupid speeds foot to the boards
and it will go wherever you point it. Quite amazing. That said if you manage
to activate the ESP in the dry then you're really motoring, and probably
doing quite illegal speeds.

My 1.8 doesnt have TC but its only the cases of slippery tight roundabouts
barrelled into under 50% or more power that you can ever get the front to
ride wide and the inside tyre to start spinning. I don;t drive around in a
field either so dont miss the TC.

Tim..

I've asked the same. My understanding is that it gives you the same
advantages of a limited slip diffeerential, keeps both wheels turning
thte same and helps avoid that one wheel spinning in the mud thing a
la My Counsin Vinnie