Well drifting involves alot more then just car setup. Drifting is more of how a driver adapts to a car. For example you can have a great drifter and he can drift a "normal" car, but you cant have a drift car and expect to drift.
Drifting aka power sliding has been around for a while, starting back in Rally and even ice racing. Its a matter of going around a corner with limited traction.
I also remember that when drifting started here in the US, people use to say that drifting is for people who cant go fast around turns, so they just drift around it. I think it takes alot mroe skill to drift then people give it credit to.
This is just my .02 cent from my experience.