Here is what I have found:
I took the MCAT last august and got an 8 on verbal (which was pretty consistant with my Kaplan practice tests). I am taking the MCAT again in April and looking back on the summer, I couldn't understand what I was doing wrong until I STOPPED doing what Kaplan told me. Kaplan tells you to map out the passage by writing a paraphrase down next to each paragraph, and write down the Topic, Scope, and Purpose of each passage-- I found that the paraphrasing after each paragraph was actually hurting me because it would disrupt the flow of the passage, I'd often be sitting there for 10-20 seconds trying to think of how I could fit the idea into a few words, which really disrupts your train of thought in relation to the passage as a whole.
At the end, writing down the topic, scope, and purpose was just a waste of time,---- basically, if you DONT know these things by the end of the passage, you have missed the point and you probably will do terrible on the passage anyway. Writing them down just took an additional 20-30 seconds off your time, every passage. Add all this paraphrasing and T,S,P time up, and you are wasting about 5-6 minutes on your VR section!
Kaplan's mapping, in my opinion, is severely disruptive to the flow of the passage and distracts your train of thought, you will often find yourself confused between paragraphs. I've changed my strategy by just reading the passage straight through, without stopping, unless to underline important things or circle keywords. Once I started doing this, it seems that I have gone from getting about 2-3 questions wrong per passage to 1-2 questions wrong per passage.
I've also heard reading the NY times helps improve your verbal. Read magazines (NOT BOOKS LIKE NOVELS--the format is way diff. than the MCAT), short articles, journals, read read read. You want to be able to look at an article and nail the main idea, everytime. The main idea is essential to like 90% of the questions.
Haha, ok, sounds like a lot of "expert" advice coming from someone who only got an 8 on verbal, but me and my little MCAT study group discuss strategies all the time, and we pretty much agree that this is what works for verbal. Hope this helps.