I work for Lexus in Tucson AZ and myself and 61 other Lexus employees frpm the Western Region, spend 3 days with the IS F @ Las Vegas Speedway on the road course.
We were able to drive the IS F with Pro Drivers and by ourselves. The car is AWESOME.
Everything about it, the rear exhaust setup, the front side vents, the under carriage covers all has a function, none of it is cosmetic.
Were went on "Hot Laps" the final day with the pro drivers going flat out, and this car is track ready from the factory period!!!!!
This car is the first sports car to have the front track be wider than the rear, which is why it handles so well.