Straightarrow,
JeffB has this one pretty much covered but I did want to point out something...
<BLOCKQUOTE id=quote<font size=1 face='Verdana, Arial, Helvetica' id=quote>quote:<hr height=1 noshade id=quote>I believe the relationship has to due with the time the arrow is in contact with the string after release <hr height=1 noshade id=quote></BLOCKQUOTE id=quote></font id=quote><font face='Verdana, Arial, Helvetica' size=2 id=quote>...
...."time" isn't so much of a factor as is distance. The longer the distance of the powerstroke the more chance there is for shooting errors to be magnified....so, yes, longer draw length archers do have a disadvantage in this regard.