obbiously you dont need traction off the line in drifting (if you did you would use 0 camber anyway....somethings no matter how they are explained make no sense to some,) but for some people they like the wheels spinning before the car has even entered the corner, and some like me like the wheels to spin for as long as possible out of the corner hence little contact patches.
With regards to the latter. I agree that handbrake and weight shift are techniques used with smaller cars yes, but turn your attention to this. You can power over ANY drift car regardless of power, obbiously more helps. With the weight shift not only are you shifting weight in a direction in regards to the left and right of the car but also forwards and backwards. A common practice in smaller powered cars (as your example the Hatchi Rouku) is to "dab" the brakes ever so slightly, this shifts weight forwards towards the nose, not only for planting the front end into the floor for good turn in grip, but also to rid the rear end of weight to use all the power available, combined with a welded diff, a nice clutch kick, no weight over the rear to start with, a touch of camber can provide epic drifts and many hours of fun.
As with everything there are aways going to be disagreements between people i say one thing another person says another, different things work for different people, i know what works for me as im making the assumption you know what works for you.
http://www.youtube.com/watch?v=pBPn6728qpw&feature=player_embedded#at=62
Nuthing to see here, no clutch kicks or power overs at all.....