Hmm... I don't think so. Normally if I use custom music I tend to set up a load of tracks that start making me better at a game. Some Heavy Metal for racing games normally works well as it gets the adrenaline increasing and in turn speeds up reaction times.

It would be funny to do an experiment on some people and see what happens when completely unfitting music is mixed with games. For example sticking county in a beat 'em up or r 'n b in a FPS.