about the citation by fumito ueda (which i didn't know) :
"reduce the volume, increase the quality and density",
i think that finally he has increased the volume with shadow of the colossus...
Sure if you consider the size of the characters!
But less so if you analyze how sparse the elements in the game are: it's a series of boss fights. That's all.
Unfortunately for me, that was about the worst thing he could have chosen to focus on.
Hope his new game is more interesting.