Hmm this is an interesting question. I believe theres a probability system and its not as random as we think, the sheer number of Turbos the game spits out should be proof enough, when was the last time you got 2 quakes a lap from the same 2 pads for 3 laps? All those turbos allowed me to close down what was a huge lead I don't remember the opponent just the 'Where the hell did you come from!' afterwards.