I find that I skimmed most passages. This resulted in me having 25 extra minutes on the PS and a whopping 40 minutes for the BS when I took the real thing. VR is just another kind of beast and I regrettably didn't take the time to really figure it out. Like above, I skimmed it just enough that I was familiar with the topic, what kinds of limitations of detail I have and how the passage is laid out so I can quickly refer back.
If I realized I would get hung up on a question or passage (that is, I had no idea how to approach it or I knew it was going to be a pain in the butt), I allotted myself only a certain amount of time to agonize over it, or I would basically skim through it to gain a sense for the questions so I could be processing it in the back of my mind. If you don't get it on a first go, move on to greener pastures. Otherwise, all you're going to do is waste time and stress yourself out even more banging your head against a wall, so to speak. But this one is pretty luck-based, as you might end up in a similar situation on the very next passage.
Finally, much of timing comes down to luck - are you familiar or comfortable with the topic? Is the passage presented or written in a way that plays to your strengths or weaknesses? Are you focused? And so forth. As annoying as it is, a good chunk of your test performance can come down to intangibles, and that's absolutely terrifying sometimes. Practice doesn't necessarily make perfect in this case, but it does make you feel more comfortable with everything.