Regarding "rabbit reflexes." Straight-A students simply don't need to look for a triple bottom where there isn't one. That is exactly what is being tested. Failing students have an advantage in this sense, but they'll still be kicked out of university later anyway, so there's no need to be envious. There is plenty of time for everything, even though I am a known slow-poke plus I check everything three or four times.
Luck and intuition are big things. I'm a bit off own axis (the wheels have come off the track and rolled away with the roof :) ), so I always help myself with magic. It works! I always choose either the easiest option or what I know.