There is a time and place for all of the sizes you mentioned. One way to look at is like this:

If you are sitting at the dinner table, HUNGRY, and they bring 2 plates, one with a 7 oz steak and one with a 10 oz steak, which one would you pick?

Probably the 10 oz. Why pass up a big, easy meal (they're both right in front you)? :9

I know at certain times smaller meals will outperform the larger ones. But that's usually of case of quality vs. quantity.