I found this quote from an old book on another site.
"And every bow should be stronger in the upper limb than in the lower for three reasons- the first is that one has two fingers under the arrow, and the hand by which it is held should properly be opposite the centre of the bow. The second reason is that all bows, which by their make bend, always shoot in the direction of their weakest limb, so that when the lower limb is the strongest (the arrow), jumps and shoots high, and farther. The third reason is that all men who wish to shoot far, must, to do so with the greatest advantage, shoot with the wind and high ; but all the same, every one does not know this, and you must know that when a bow is strongest in the lower limb, it corrects this fault of itself."
http://www.archerylibrary.com/books/gallice/docs/chapter02-1.htmlDoes this still ring true?