Hi TalonShade.
I would put it this way.
If you are scoring high on quant and getting all or almost all of the questions correct, from what I've seen, you'll see about 5 to 7 hard questions of which maybe 2 or 3 will be particularly challenging, i.e., 750+.
If you are scoring high on verbal and getting all or almost all of the questions correct, my guess is that around two each of the SC, CR, and RC questions will require you to use a lot of thought and be very careful to get them correct.
Other than those questions, most will be medium or medium hard and will be relatively straightforward to answer though, in order to get them correct, you will have to be careful.
Also, you can get a sense of the average difficulty of the questions by considering these difficulty graphs from an ESR for a test on which the test-taker got all quant and verbal questions correct.
