I'm usually pretty disappointed, because on a failed opening attempt I end up crushing those chips, and then feel like I didn't really get my money's worth.
It's alright. Chips and cereal are sold by weight, not volume. Some settling (or crushing) of contents may have occurred during shipping and extraction.
I realize they are sold by weight, but I'll be honest, the full size merchandise is worth more to me. It is even worse on cereal, my wife saves the end of the box for me because i'll eat it. I prefer the full size, but throwing out the 'fluff' (crushed bits and powder at the end) seems like a waste.