Drifting on the street can be fun and all... But I aspire to the likes of skilled autox and road racing. If you drifted on those tight turns youd never finish the race. Hell youd probably never stay on the course at all. ANd it woudl take longer. Bottom line, on tight courses, I think drifting is slower.
Whens the last time you saw an F1 car drift around a turn like the drifter racers do? Never. =)