Well in larger jars you do have a bit more room for error.

What I mean by that is you will see signs of moisture in a jar with a bit more room then a jar that is tight. The moisture will rise to the top and form as drops on the side of the jar.

Personaly I prefer a jar that is not over 80% full anyway so you are good to go as far as I am concerned.

What others say about tight packing the jar.....well just think about my logic and you decide.

There is no proof one way or the other that I know of.