TPR Practice Test D... ugh

For those of you that have taken the MCAT and the Princeton Review course already, how hard was TPR Practice Test D (in that book they give you) compared to AAMC IV, V, and the real thing? I haven't done the latter three yet, but I found the verbal on D to be a lot longer (several in excess of 90 lines) and harder than anything I had done up to that point... it was sort of upsetting, because I had been doing reasonably well on verbal practice passages up to this point.