Ummm... Not really. Not praising the GT academy physics here, but if you ever look at the most famous racing drivers, what are they known for? The four-wheel drift technique. Being so much faster than everyone else because they can consistently scrub speed off the front tires without braking.
You guys ever heard of Tazio Nuvolari. He's a driving god. You ever read Enzo Ferrari's account of driving with him?
'With Ferrari as a passenger in Nuvolari's race car, the great pilota was pre-running the Three Provinces Circuit, upon which he had never competed. Writes Ferrari: "At the first bend, I had the clear sensation that Tazio had taken it badly and that we would end up in a ditch; I felt myself stiffen as I waited for the crunch. Instead, we found ourselves on the next straight in perfect position. I looked at him: his rugged face was calm, just as it always was, and certainly not a face of someone who had just escaped a hair raising spin." Ferrari continued to note that he experienced the same sensation through the next several bends. "By the forth or fifth bend I began to understand; in the meantime I noticed that through the entire bend Tazio did not lift his foot from the accelerator, and that, in fact, it was flat on the floor. As bend followed bend I discovered his secret. Nuvolari entered the bend somewhat earlier than my driver's instincts would have told me to. But he went into the bend in an unusual way: with one movement he aimed the nose of the car at the inside edge, just where the curve itself started. His foot was flat down, and he obviously changed down to the right gear before going through this fearsome rigmarole. In this way he put the car into a four wheel drift, making the most of the thrust of the centrifugal force and keeping it on the road with the traction of the driving wheels. Throughout the bend the car shaved the inside edge, and when the bend turned into the straight the car was in the normal position for accelerating down it, with no need for any corrections."'
You know who else was famous for this driving style? Stirling Moss. Jim Clark. Some even say Ayrton Senna.
When it's done right, it's not slower, not by a long shot. It's just never done because it's soooo inconsistent for most people to pull it off.