RC:
My first 4WD car was a Lancia Delta HF Integrale... I was young...

Ah, the Integrale, I had two of them and can echo your experiences. Never really trusted them at the limit... (still remember them fondly though).

To me 4WD just gives a safer feeling below the limit (and I guess that's the peace of mind some customers are after).

It all comes down on being able to judge (and feel) the amount of grip. The tricky bit is to respond accurately, and that's where 4WD sends vague signals...