Unfortunately I don't have any science to share with you, but I've been experimenting with cutting out liquid at meals for the past week, and I feel the best I've felt since starting this way of eating. First I cut out lactose, then all dairy, and I was still having digestive problems, then I only drank between meals and my digestion was fine. More than that, I wasn't as hungry between meals, and these random bouts of irritability and depression I would get disappeared almost entirely.
I really don't know the science behind it, but it's worked for me.
Of course, my only worry now is meals that are mostly liquid, like that big batch of broth I made yesterday. :/