Now THERE'S a bet I would jump all over! How can you add roughly 2 lb's to your set up and not know it?? Ok, maybe 1.5........2 may have been a little high.
Depends a lot on which quiver I suppose, BUT IF you have 5 400 gr. total weight arrows, that is less than 5 ounces, leaving you more than 11 ounces to make a pound. SO, I'd bet that my two piece quiver with 5 arrows weighs less than 1#.
At full draw, I'd bet than 1# of weight would not be detected. Heck, at full draw I'd bet than 2#'s wouldn't be detectable by most!