top end cars you refer to are supercars - I occasionally work on the following cars Lambo Gallardo, Ferrari super America , 996 GT2 , 997 GT3RS , 997 Turbo - They are all factory dry sumped. These cars are true race bred - have millions more spent on design and have decent sized engines (not like the lil 2.0 or 2.5 in our Sub\'s) - They can handle pretty much any muppet behind the wheel.
They are effectively the opposite of what this thread refers to in regards to road cars being raced, as they are race cars being driven on the road