I've thought of doing this as well. I might try it out a couple times in the next week or so as well. It sounds like a great way to zero in on those curve breaker questions that might fool you twice as the above poster mentioned.
There is a comparative RC passage, so it is definitely recent. Also, the LR questions were worded like the 60s and 70s.
@"Burt Macklin FBI"
The -9 curve compensates for the degree of difficulty of the exam.
I hate to be the bearer of bad news, but I think the curve for this test was determined like over 3 years ago and not on the distribution of how the collective test takers did today. Please correct me if I'm wrong.