I disagree. Without an LSD all that will happen is that the inside wheel will spin. If you want to kick the rear out under power you will need an LSD. In any case going into a drift is achieved by shifting the cars weight using the brakes, clutch or handbrake, not by applying power - the power only maintains the drift.
If you watch the "Drift Bible" DVD from Best Motoring (which is very cool indeed btw!), the guy demonstrates the various ways of setting up a drift, by using the handbrake, sidestepping the clutch, doing the old scandinavian flick or just turning in on the brakes. Then you feather the throttle to keep the back out, which is going to be near impossible without a LSD.