I also took delivery today of my Silver/black IS300! Car was perfectly prepped and had none of the yellow spots others have encountered on their Silver IS's paint jobs.
Car seems very tight and quiet...no interior noises whatsoever! Put on the headlights tonight and was surprised at how "blue/white" they are...also the little leveling movement when the headlights first come on is very cool.
Lexus has hit a homerun with this car. It's worth waiting for.