I have tried as a noobie, and it's possible, and a bit time consuming, but, it is quicker than most techniques I've seen used.
Also, it's an easy way to make a detailed face to start with. Most curve stuff is usually nurbs.
Here's an example I got of patch modeling from http://www.highend3d.com/maya/tutori...nurbs/164.html
Hope this helps.
"The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself. Therefore all progress depends on the unreasonable man."
George Bernard Shaw - Man and Superman