I did PT 60s and I think they are comparative harder than 50s and 40s. Maybe it is because LSAC changed some styles. But the fundamentals are the same. Premise, conclusion, get the support, get the flaw, attack it or bridge it!
I like the comparative passages too, @leonsmoney ! It's definitely easier for me to maintain my focus through two separate 2-paragraph passages as opposed to one long 4-paragraph one.
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.