Let me start out by stating that I shoot split finger and always have. But we ran a test at our club with beginning archers who were taking their first lesson. We had half set up with three fingers under bows and half set up with split finger bows. (All our junior archery recurves are equipped with "no-gloves", so it was easy to control their shooting style.) What we found was that the 3-under shooters managed to get on target faster with greater accuracy than the split finger shooters. While the test wasn't scientific, and the students were shooting at extremely short distances (10-15yrds max) it does illustrate what the NAA advocates in their coaches class: beginning archers will profit best from a 3-under style; it allows them to gun barrel the arrow right up under their eye and relieves them of having to figure trajectory while they're still trying to settle on form.