I have had my car for almost a month and have driven 2,200 miles since I purchased it. I have no issues with the clutch, or shifter. My car was built January 2011 and perhaps it was the earlier builds that had the issues with the clutch. As far as cylinder #8 is concerned there are too few occurances for me to worry about, and who is not to say that those threads around the internet weren't started by a Camaro owner who wanted to start a frenzy amoungst us? Or if not someone had an aggressive tune and put a cheaper grade of gas in the tank because the gas prices were jacked up around the country for a while (still are but getting better!) and all hell broke loose. If this is preventing you from purchasing a great car, you are missing out!
Its mostly a " i rather be safe then sorry " situation, But in any case this thread has been up a few days and iam more then sure if it happened to anyone that's active on this forum it would have been blurted out by now....How?, why? , gas? etc etc etc.
It all comes down to BS and for the most part it seems either someone screwed around with some nitrous or tried screwing with timing on their own terms and F'ed shit up.