Douglas Dent covers it in "Professional Timber Falling a Procedural Approach" pp 101 - 105.
I've never used the face bore cut as I've always had to have a long bar to make the cut. Now that I've sold my 372xp w/ 32" bar and only have the 346xp with a 20" bar, I may have to use this technique. My concern is how to manage getting a wedge in the back, and equally cutting the two sides of the hinge before the tree falls. If the hinge isn't cut precisely you risk unintentional pulling the tree to one side (especially when cutting a little slower with an undersized saw). Seems like a lot to manage! If the tree has a natural fall to the face, it would seem logical to bore in from the sides and leave a trigger on the back of the tree to nip for the fall.