Well I'll tell you personally that during my practice FLs, I got frustrated with having most of the explanations for questions I missed begin with "As stated in the passage..." or "According to the passage..."
I finally realized that it wasn't content that was limiting my score... it's that I wasn't using the passage info effectively.
I changed my approach by making my first run through of the passages pretty quick, but just carefully enough to know what was their (also highlighted info that seemed important so I wouldn't have to waste time making written passage maps), but on every question I made CERTAIN that if there was info from the passage I needed to answer correctly, I wasn't going to miss it.
It certainly made my practice scores skyrocket... I don't know yet about the real thing, of course.