actually, they are commonly called exceptions to the rule, or even coined by others as 'factory freaks'. most magazines will get a car from the factory, given to them for testing purposes, and they will make several passes in that car, often by different people, and tally the average. typically this is pretty consistent in giving a good idea of what the car is capable of. yes, i've 'heard of' certain types of cars running x number of tenths quicker than what the magazines say, but as i said before, these are exceptions. that being said, i've driven a stock gti and i don't believe they are capable of running faster than a mid 15.