Silent, I agree that there are times when I know what the responses will be before reading a post. A perfect example is the "Should I buy and 'X' brand bow?" post. I know there are going to be 20 replies saying "Go to a pro shop and shoot as many bows as possible and pick what feels best to you." While that is good advice, I'd bet half the time the person still buys 'X' brand bow because they want to be in the "in" crowd or whatever.
On the tuning thing I also agree that proper arrow flight is essential to good penetration. I think that paper tuning is a good indicator of proper arrow flight, but is not the only indicator. For example, I have had cases where I was getting bullet holes in paper, but when I tried fixed blades (which I don't know why I bother because I always come back to mech.s for deer anyway) I couldn't get consistent groups. That indicates a flight problem to me. After making some minor adjustments the broadheads grouped, albeit not with my field points, but that is another story altogether. Then I went back to the paper and was still getting bullet holes. So, you can be getting bullet holes but still need some fine tuning to work the bugs out. If you get a chance check out Easton's tuning guide. That thing has a ton of tuning tips in addition to paper tuning that you may find helpful. Some of it you may not find useful, but it's interesting nonetheless.