I did the aim test and the reaction test today at work. Here are the results from my first try at each on my work computer with a basic 60hz monitor and crappy mouse.
Reaction - 200
Aim - 637
However in my second go, I got the following.
Reaction - 198
Aim - 443
I think the Aim test is flawed. The difference between the first and second Aim test for me, was that the targets kept appearing in bunches near to each other in the second test. While on the first test they were all over the place. Which meant that I got a much higher score in the second test as it was far easier. There is a lot more luck involved than any of the other tests.