I just took the 121 so I cannot help you with the 135 - but since I was doing the ADX as well I studied all aircraft - and I did get 1900 Q's (I think it was for single engine flying perf chart?

I am probably telling you nothing new but - my biggest eye opener on the test was how tight the tolerances got on the charts - on the CM or FEX you could eyeball the lines to the answer - some of these I had to use a piece of paper and follow the lines.

You are a better person than me if you can take the test on the computer images and not use the paper book for this test for the charts.