Thank Rico,
I thinks some people take a suggestion as an absolute. There are very few absolutes in shooting a bow. If a person perfers super heavy arrows, I would opt for a too heavy arrow over an arrow being underweight.
However, as I just stated on the Widow Wall, there are other factors that will determine how much penatration you will get on game, and arrow weight is not the only one.
Longbrawl stated that he prefers a super heavy arrows, and presented support for his choice based on deer he shot.
My fiancee' shot through a hog, generally known to be a little more dense than a whitetail with 45 pound bow shooting 450 grain arrow. Now if I were to accept that, I might be incline to support light arrows. However I donot support light weight arrows, I just think that a balance between reasonable weight(proven over the years by great bowhunters)and reasonable speed will be best for most.
Having said that, if I were to limit all of my hunting to ranges of twenty yards or less, then I might be likely to adopt a much heavier arrow.