In my personal opinion drifting is the slowest way around a corner where grip is high. Drifting will make you quicker if the surface is loose or low on grip.

But to drift the rear wheels should be pushing the car, and the front wheels should be turning. Can't really do that in a FWD car - this is considered skidding or oversteer.

Time and time again I've seen guys at autocrosses ask why when they were drifting their times were slower than mine. My only response is if you are slipping (drifting) then you are not accelerating - which means quicker times. I like to be on the accelerator 95% of the time and braking 5% of the time