I disagree. I think that there have been alot of animals that have been lost because the size of broadheads in general gets smaller. I know alot of guys that kill alot of animals each year. Some have gone to bigger fixed broadheads, others to mechanicals because it increases the size of the wound channel.
You may not like mechanicals, but one of the marketing points of a popular mechanical is that it is like throwing an "axe through an animal". Big wound channels make marginal hits lethal hits.
It isn't the GOOD hit you have to worry about, it is those less than perfect shots. There is no way you can guarantee perfect shots on a live animal. There are variables you can't control, such as the movement of the animal at the shot. cold muscles, anxiety.
If size didn't matter than why don't they allow hunting with bullets like the .223? Just my 2 cents...