Snap-shooting - the good kind - is a very precise, and very controlled fuid form where the shot is executed in one smooth motion, and you will be hard put to find an achor hold of any kind watching or videoing it.
I shoot my best that way, with a swing draw, pulling through the shot, attention focused on the target spot, and so far, it's the only way I can shoot a 1 inch group at 20 yards.
Lots of hunting situations do not permit a free swing draw. For those I use a push-pull draw, with the same fluid single motion and release, pulling through the shot. Put three arrows in a ping-pong ball at 18 yards that way, last week.
I call it a floating form, as the whole thing is about drawing the line of the arrow to the target spot and releasing along that line with no torgue, cast or pluck, and no set anchor. It's all about the "line" and feeling the line. It's sort of a "pump", and it produces unbelievably consistent shots, on the spot. If you want to hold all day with that line, still pulling - still pushing, you can, and release when ready. I find my groups open up when I do that, but it still works fine. Perhaps, that last bit is the same as comming to anchor, but for me, i don't seem to have a great anchor spot on my face that conforms to the "line", so i let it float.
Now this snap-shooting does not dispense with any of the essentials of good form. Hand and shoulder position, orientation to the taget, focus on the spot, drawing with even back tension (the "pump" is all back tension) with relaxed bowarm and drawing hand.It adds pulling through the release, and you get a feel for full draw from the tension, instead of a spot on your face.
If it were not a considtent form, how could it put 4 arrows in a 1-inch group and on the spot?
Snap shooting is not for everyone, and I can't say it's a superior form. But I shoot it, and amaze myself, so I think it superior for hunting. Anyone that wants to can learn it, but don't let me mess you up on form.
Oh, yeah, it's not about speed. It can be nice and smooth and slow - just one fliud motion. If you ever get to see old films of the Wilhelm Bothers from the '30s - one shoots dice of the other's head using a swing draw and snap shooting from the hip level - same form.