We don't really drive under any form of adrenaline (epinehrine?) because we are well aware that 80% of jobs are not worth speeding to... Like other forms of driving, with enough practice you can indeed drive 'like a nutter' while other parts of your brain are thinking of other things. Besides, is Queen more or less distracting than various neenaw noises? (Some crews drive to jobs drinking the coffee that they had just made, or smoking the ciggie that they had just lit, and they don't have accidents any more than the rest of us). We aren't so much 'high speed' as 'making progress' which is a subtle but important difference.