perhaps you can skim the questions quickly (was this mentioned already?) That way you can figure out what points are relevant in the passage. There is a lot of fluff in some of those passages so you need to tease out the essential information, difficult if you dont know WHAT to look for. It may take time at first but once you get used to identifying key information from skimming the questions, you should go a lot faster.
Personally I didnt have time issues, but I did notice that I would read the passage, read the questions, and then go back and skim the passage for pertinent information (a waste of time if you're crunched). If I had problems with time I would have glanced that the questions first and then read, keeping in mind what I needed to answer those questions.