I've heard it only in context that you're not supposed to do it.

I was watching some in-car vids of track racing, and it doesn't seem the turns are sharp enough to justify more than a hands at 12 and 6 position.

I was toying with trying not to do it in my daily driving (not high speed, just when doing sharp, 90 degree plus corneres, like when pulling in/out. I didn't see the helpfulness.

Can someone please elaborate on this concept, and when it is applicable?

I realize that in auto-X you probably have sharper corners than in track...

-PHiZ