As I mentioned in the examples, we had meat products, processed meats. I don't think it applies simply to snack products. I think with a bag of frozen peas or a can of corn, it's the same thing: each company decides what they're going to use as a serving.
Would it be more practical if it defined what the package had in it, if you ate the whole thing, or have we somewhere along the line decided that a “serving” would be the measurement? Sometimes when you see what a serving is, you'd say that what is in Mr. Steckle's glass is called a serving of orange juice, and you'd ask yourself, who's going to have one-eighth of a glass of orange juice?
The measurements are beyond reality, so it comes down to the truth in advertising question.