@passedit: Ignoring the fact that you replied to a post I made over four years ago, I do not understand why you are confused.
My first run was eight hours on medium. I didn't really skip anything; did all of the mini-games and so on. I have a tendency to play through games more quickly, but I don't know who told you 30 hours was average.
Don't want to read too deeply, because I have yet to play To the Moon and Gone Home. =p
I can't say I have had quite that emotional experience from a game, but maybe in the future I will find something that hits the spot and I am glad people including yourself have drawn that from improving storytelling in games.
(for contest, I would appreciate the Battlefield 3 code; thanks!)