There are those who argue that "grip" style driving is the fastest way...that drifting is a slow way aroud corners... In theory this is very true... But, in multiple car competitions, the more options the driver has in terms of his line, braking points and skill, the more chances he'll have to pass the leading car that's blocking his "proper line."
You see now, that a guy who can drift well, fast and accurate, is the best of "grip" style drivers. He would know his tire's limits better, has more control beyond limits, and more lines to pass are available to him with very predictable results.