This post has some of my Aussie bias in it, so I apologise in advance for my patrotism.
I have an incredible passion for late 60's, very early 70's American Muscle Cars of all denominations, own a few, all Chevs, brother has mustangs, friends have plenty of the rest.
This sedan is world class, I have a HSV version, it is a great car. I'm currently building a pro-touring 1968 Camaro Convertible, LS1, 6 speed etc. I will have spent 2 twice what I paid for the R8 Clubsport and apart from what I care to modify the engine it will never offer what the Clubsport does as a touring car that I can insure and drive every day. 6 litre 6 speed auto, 19" wheels, 365mm front disk, low 13 sec 1/4, you get the idea.
Here in Australia we have probably an European/Japanese influnce due to Right Hand Drive, so I have had the chance to drive the top end BMW, Mercedes, Audi, Lexus etc,but we still love our "muscle car" V8 rear wheel drive. As a pro-touring sort of guy I would take the Clubsport over all of others, except maybe the few exoctics. Add a super-charger to the LS2 and it's not fair to the guys who paid $100,000 more for their exotic.
I understand why there was a dislike to the Monaro "GTO", should have been called something different, but I believe those who drove it appreciated what I good car it was. Main criticism seemed to be about the seating. Lutz drove it and loved it, he has seen what is being done here.
The 2009 Camaro is being engineered here for a reason.
The smallest book in the world could be great American sedans 1970 to 2000, and trust me I've rented a few.
So get out and drive one of these, you'll a least be mildly surprised at how good a 4 door, push rod V8 car can be, and they will be built in the USA.