Yea humanities should beat everyone on VR. I'm a phil major and while I smiled a little when I read about the relation of epistemology to morality in one of the EK101 passages, it doesn't really help with a lot of the "How would this author feel about..." type questions. Also, academic philosophy is a lot more focused on the (very) careful assessment of an argument in order to form a counter-argument, and you can't really concern yourself with minutiae on the VR section. Reading philosophy, at best, will familiarize you with the style of writing (which is very different from anything you would read casually or have to read for a social sciences course).
I would, however, assume that philosophy majors probably outscore most on the writing section.