Just why I chimed in - so I could be proven wrong!
I've never drifted, but recently saw something at Infineon (on Speed Channel) and the speeds of those guys going into the first turn were something like 90mph.
The demo video you posted (while entertaining and risky) showed a smoothly trowelled concrete surface at ~ 10mph.
Now I'm really curious if there's anybody out there doing seriously competitive Boxster drifting - because the older 2.5s and 2.7s are pretty cheap and can be selectively lightened. Are the difter's choice of tires really hard?... DOT 300-400?
kj