yeah...the brace height really explains how long the arrow is on the string...the longer it's on the string the more time you have to mess it up and the more bad form will mess it up. The A to A distance just makes it more stable, think short stabilizer vs long stabilizer...or a tightrope walker using a long pole to keep their balance...the longer the a to a the more stabile it'll be and less prone to drifting or swinging....in theory! Some bows are naturally more forgiving or stabile though which is why test shooting many bows is so important.