I think it was on the Scooby BBS, that they were discussing the use of the diff in the Evo ie: Making it virtually rear wheel drive hense the outrageous back end out, although after seeing Tiff drive this on 5th gear the do have a tendancy to oversteer
Also by the look of the video, the crash was caused by the rear tyre puncturing - No fault of the driver ... Shame about the car mind !
Apparently that car belongs(used to anyway...) to a french driving school. The driver that was pulling the nice 4 wheel drifts is the instructor, while the girl that crashed the car was his dughter. The cause of the crash seems to have been an over-inflated front tire which blew under braking before the corner.