I've got to give credit where its due, my wife has been competitive for the following reasons.
1) She drives her own race and never gets caught up in heads up battles with other drivers.
2) she finishes every race.
3) she drives a really good line and will drive the car slowly if that is whats required to hold that line.
4) shes got an awesome mechanic to look after the car
Without a word of a lie the only part of maintenence she is involved in is fuelling and cleaning and thats the way I like it.
On average she drives 15-20% slower than most males she races however to finish first, first you must finish.
Personally I couldnt drive like it as I would fall asleep, but it works for her and there were some serious cars in the last series that didn't beat her.